Brands

Vortex Mixers

<h2>What are laboratory vortex mixers?</h2>
&nbsp;
A laboratory vortex mixer is a small benchtop instrument with an eccentrically rotating motor that drives a cup-shaped rubber head in a rapid circular path, creating a vortex in liquid-filled tubes or vessels pressed onto the cup. The vibration transfers through the closed tube wall to the liquid, generating a powerful swirling vortex that thoroughly mixes tube contents within seconds. Vortex mixers are used throughout the laboratory for resuspending pellets after centrifugation, mixing enzyme reaction components, homogenizing samples, dissolving compounds, and briefly but thoroughly mixing any small tube or vessel.
&nbsp;
<h2 dir="ltr">What you will find:</h2>
&nbsp;
<ul>
<li dir="ltr" style="font-family: arial, helvetica, sans-serif;" aria-level="1">
BLUline vortex mixer: with a flip-head for faster, touch-based mixing
</li>
<li dir="ltr" style="font-family: arial, helvetica, sans-serif;" aria-level="1">
BenchMixer&trade; vortex mixers: for everyday, reliable lab vortexing
</li>
<li dir="ltr" style="font-family: arial, helvetica, sans-serif;" aria-level="1">
BenchMixer&trade; XL multi-tube vortexer: for high-performance output sample processing
</li>
<li dir="ltr" style="font-family: arial, helvetica, sans-serif;" aria-level="1">
Labnet Orbit 300 multipurpose digital vortexer: for programmable and controlled mixing
</li>
<li dir="ltr" style="font-family: arial, helvetica, sans-serif;" aria-level="1">
Vortex mixer accessories: including horizontal heads, tube racks, and foam holders for different tube sizes and applications
</li>
</ul>
&nbsp;
<h2>How to choose a vortex mixer</h2>
&nbsp;
Choose touch-mode for ad hoc brief mixing and continuous-mode for timed runs
Touch-mode vortex mixers run only when a tube or vessel is pressed against the cup head, stopping immediately on release &mdash; the natural format for brief, on-demand mixing during pipetting workflows. Continuous-mode switches the mixer to run at a set speed without tube contact, suitable for timed mixing steps or when using a multi-tube adapter for batch runs.
Match vortex speed range to your application
Standard vortex mixers operate between approximately 600 and 3200 rpm, with lower speeds appropriate for gentle mixing of delicate samples or larger vessels, and full speed appropriate for vigorous resuspension of tightly packed pellets. Variable-speed models with a dial allow speed to be dialed down for sensitive applications.
Confirm tube compatibility with the cup head or adapter
The standard cup head on most vortex mixers accommodates 1.5 mL and 2 mL microcentrifuge tubes directly, and most standard tube formats up to approximately 50 mL can be mixed by holding the tube against the cup at the appropriate angle. For 15 mL and 50 mL conical tubes, holding at a slight angle rather than vertical provides more efficient mixing.
Consider a multi-tube foam insert for batch processing
Foam inserts and multi-tube adapters allow 6, 8, or more tubes to be mixed simultaneously during a timed continuous-mode run, suited for batch mixing of many samples between processing steps.
Check that footprint and noise level suit your bench placement
Vortex mixers vary considerably in physical footprint and operating noise; models with a suction-cup base or weighted housing reduce walking on the benchtop at high speed. For open-plan labs or shared spaces, noise level at full speed is worth checking in product specifications.
&nbsp;
<h2>Specifications context</h2>
&nbsp;
The classic vortex mixing action produces a liquid vortex through eccentrically driven cup oscillation at typically 2000&ndash;3200 rpm for full-speed operation, a mechanism that has remained essentially unchanged since the Vortex-Genie design introduced by Scientific Industries in 1962. As of 2026, variable-speed vortex mixers with touch-mode and continuous-mode operation and a removable cup head for accessory attachment remain the most widely used format in molecular biology and biochemistry labs.
<a href="https://mbpinc.net/contact-us">Contact the MBP team today</a> to request a quote and find the right vortex mixer for your application.

Product Literature

BenchMixer™ Vortexer Mixer Accessories

BenchMixer™ Vortex Mixers

BV1000 by Benchmark Scientific is the BenchMixer Vortex Mixer, a variable-speed benchtop vortexer running 200-3200 rpm with Q-Drive technology, touch or continuous mode, no-walk suction feet, and cold room and incubator compatibility.

Speed Range

Operating Modes

Orbit

Dimensions (in)

Dimensions (cm)

Operating Temp.

Weight

Electrical

Warranty

Manufacture

BenchMixer™ Vortexer 115V

BenchMixer™ Vortexer, 230V

2D Rockers

<h2>What are 2D rockers?</h2>
&nbsp;
2D rocking platforms produce a simple, rhythmic back-and-forth tilting motion on a single axis, causing liquid to flow alternately from one end of the platform to the other with each tilt cycle. The simplicity of this motion is its strength: a consistent linear sweep of liquid across the platform surface ensures even exposure of the membrane or gel to the incubation solution on every cycle, with no rotational bias that could cause uneven staining or antibody distribution. 2D rockers are the universal standard for western blotting workflows and gel processing because their motion is gentle, predictable, and highly effective at sweeping liquid uniformly across flat surfaces.
&nbsp;
<h2 dir="ltr">What you will find:</h2>
&nbsp;
<ul>
<li dir="ltr" style="text-align: left;" role="presentation">BenchBlotter Platform Rocker (Fixed Speed): Simple, reliable rocking for blotting, staining, and destaining.</li>
<li dir="ltr" style="text-align: left;" role="presentation">TubeRocker Compact Rocker (Grooved Mat): Secure mixing of 1.5&ndash;50 mL tubes with fixed speed and tilt.</li>
<li dir="ltr" style="text-align: left;" role="presentation">BenchRocker 2D Rocker (Variable Speed): Adjustable speed and tilt for flexible lab mixing applications.</li>
<li dir="ltr" style="text-align: left;" role="presentation">2D Everlast 247 Rocker: Continuous-duty operation, ideal for use in incubators and cold rooms.</li>
<li dir="ltr" style="text-align: left;" role="presentation">QuadRocker Tiered Rocker: A multi-level rocking system with over 750 sq. in. of usable surface area.</li>
<li dir="ltr" style="text-align: left;" role="presentation">Globe Scientific Fixed Speed Tube Rocker: Consistent fixed-speed mixing for 1.5&ndash;50 mL tubes.</li>
</ul>
&nbsp;
<h2>How to choose a 2D rocker</h2>
&nbsp;
Confirm the speed range covers your applications
2D rockers typically operate from 5 to 40 rpm, with most blotting applications running at 10&ndash;25 rpm. Some rockers are fixed-speed at a single rpm; variable-speed models provide flexibility to use slower speeds for gentle antibody incubation and faster speeds for wash steps. Confirm that the rocker's speed range accommodates all your planned protocols.
Select a platform size that fits your largest container
Platform size determines the maximum container dimensions: a 25 &times; 30 cm platform accommodates most standard blot boxes and gel staining dishes for common gel formats. For larger gel formats or when running multiple smaller containers simultaneously, a larger platform of 30 &times; 40 cm or more provides the necessary space.
Check the tilt angle adjustment if the rocker offers it
Some 2D rockers allow adjustment of the tilt angle as well as speed, which affects the aggressiveness of the liquid sweep. A larger tilt angle at the same speed produces a stronger sweep but may cause liquid to slosh more vigorously, risking splashing and membrane disturbance at higher angles. For standard antibody incubation, a moderate tilt angle of 10&ndash;20&deg; is typical.
Consider timer and programmable functions for unattended incubations
Some 2D rockers include a built-in timer that switches the rocker off after a set incubation time, preventing over-incubation when the user cannot monitor the step in real time. This is useful for overnight antibody incubations set to run at low speed inside a cold room or refrigerator.
Verify suitability for cold room or incubator use if needed
For overnight antibody incubations at 4&deg;C or hybridization at 37&deg;C or 65&deg;C, a rocker rated for the relevant temperature environment and humidity is required. Standard bench rockers are not always rated for cold room humidity or elevated incubator temperature.
&nbsp;
<h2>Specifications context</h2>
&nbsp;
The 2D rocking platform's single-axis tilt produces a consistent, repeatable sweep pattern that has been validated in western blotting protocols across decades of use, making it the most protocol-tested agitation format in molecular biology. As of 2026, variable-speed 2D rockers with a digital display and built-in timer remain the standard configuration in most molecular biology labs where western blotting is performed routinely.
<a href="https://mbpinc.net/contact-us">Contact the MBP team</a> today to request a quote and find the right laboratory rocker for your application.

Stacking platform, small 10.5"x7.5" with flat mat (3.0" separation)

Stacking platform, small 10.5"x7.5" with dimpled mat (3.0" separation)

Stacking platform, large 12"x12" with flat mat (3.0" separation)

Stacking platform, large 12"x12" with dimpled mat (3.0" separation)

Stacking Platform, extra large 14"x12" with flat mat (3.0" separation)

Additional platform separators (4 ea.). Adds 1.25" to platform separation

LaBungee™ 4 cord bungee cord pack 7" to 12" working size

BenchRocker™ 2D Rocker, variable speed, 14"x12" platform

BR2000 by Benchmark Scientific is the BenchRocker™ 2D variable-speed rocker with a 14 × 12 in autoclavable flat mat platform, independently adjustable speed (2–30 rpm) and tilt (0° to ±30°), and a maintenance-free brushless motor rated from +4°C to +50°C — safe for cold rooms and incubators. Load capacity is 8 lbs (3.6 kg). Accepts optional stacking platform (BR2000-STACK) and additional flat mat (BR2000-FLAT). Available in 115V (BR2000) and 230V (BR2000-E). 2-year warranty.

Tilt Angle

Platform Size

Load Capacity

Operating Temp. Range

Power

BenchRocker™ 2D Rocker, variable speed, 14"x12" platform with flat mat, 115V

BenchRocker™ 2D Rocker, variable speed, 14"x12" platform with flat mat, 230V

3D Rockers

<h2>What are 3D rockers?</h2>
&nbsp;
3D rockers are laboratory rocking platforms that produce motion in multiple planes simultaneously &mdash; combining the basic back-and-forth tilt of a 2D rocker with a simultaneous lateral tilt, wave motion, or orbital component &mdash; creating a complex, three-dimensional liquid flow across the platform surface. This multi-axis motion ensures that liquid reaches every part of a flat container or membrane, including corners and edges that single-axis rocking can leave as dead zones with reduced agitation. Some 3D rockers (sometimes called nutators or wave mixers) produce a gyrating or teeter-totter-plus-wave motion rather than a strict two-axis tilt.
&nbsp;
<h2 dir="ltr">What you will find:</h2>
&nbsp;
<ul>
<li dir="ltr" style="font-family: arial, helvetica, sans-serif;" role="presentation">Labnet Gyrotwister 3D Shaker: Adjustable tilt angle and a non-slip platform for consistent sample mixing.</li>
<li dir="ltr" style="font-family: arial, helvetica, sans-serif;" role="presentation">Mini BlotBoy&trade; 3D Rocker: Ideal for small-scale blotting and gentle mixing&nbsp;</li>
<li dir="ltr" style="font-family: arial, helvetica, sans-serif;" role="presentation">BlotBoy&trade; 3D Rocker: Larger area for reliable blot processing, staining, and washing.</li>
<li dir="ltr" style="font-family: arial, helvetica, sans-serif;" role="presentation">BioMixer&trade; 3D Nutating Shaker: Designed for smooth, thorough mixing of biological samples.</li>
<li dir="ltr" style="font-family: arial, helvetica, sans-serif;" role="presentation">Tube Rocker 3D Motion:&nbsp;Used for efficient and uniform mixing of various tube sizes.</li>
<li dir="ltr" style="font-family: arial, helvetica, sans-serif;" role="presentation">BenchWaver&trade; 3D Rocker: For stable and consistent sample agitation.</li>
</ul>
&nbsp;
<h2>How to choose a 3D rocker</h2>
&nbsp;
Understand the specific motion type of each 3D rocker model
The term "3D rocker" covers different motion patterns: true dual-axis tilt (simultaneous tilt on both X and Y axes), wave-motion platforms that combine tilt with a propagating wave, and nutator-style platforms that produce a gyrating circular-tilt motion. Each produces a different liquid flow pattern, and checking the manufacturer's description of the platform motion helps in predicting how liquid will move in your specific container type.
Choose a 3D rocker when corner coverage in flat containers is important
In flat containers like square or rectangular blot boxes with right-angle corners, single-axis 2D rocking may leave residual unmixed volumes in corners on each sweep. A 3D motion that alternates between both tilt axes or produces a wave ensures liquid reaches all corners on each mixing cycle, producing more uniform washing and incubation.
Use a 3D rocker with tube holders for gentle multi-directional tube incubation
Many 3D rocking platforms accept tube holder accessories that fix microcentrifuge, 15 mL, or 50 mL tubes on the platform, providing a multi-directional mixing motion for tube contents without requiring a separate dedicated tube rotator. For gentle incubations where end-over-end rotation is not required, this is a convenient multi-use configuration.
Verify speed range and tilt angle against your application requirements
3D rockers operate at lower speeds and tilt angles than orbital shakers, typically 5&ndash;25 rpm with tilt angles of 10&ndash;30&deg;. Confirm that the rocker's speed range and tilt angle are appropriate for your specific incubation &mdash; gentle cell culture rocking requires lower speed and shallower tilt than more vigorous blot washing.
Consider platform size relative to your largest container
As with 2D rockers, the platform must accommodate the largest container you intend to use, with the additional consideration that in a 3D motion platform, a container positioned asymmetrically relative to the motion center may experience less uniform agitation at its extremes.
&nbsp;
<h2>Specifications context</h2>
&nbsp;
The nutator-style 3D rocker uses a tilting platform driven in a slow circular path rather than a strict two-axis tilt, producing a smooth gyrating motion that keeps liquids in continuous gentle motion without the periodic deceleration of back-and-forth rocking, and is a common format used for gentle hybridization and tube mixing applications in molecular biology. As of 2026, compact 3D rocking platforms with programmable speed and timer are standard in molecular biology labs handling multiple blot and hybridization incubations simultaneously.
<a href="https://mbpinc.net/contact-us">Contact the MBP team</a> today to request a quote and find the right 3D rocker for your lab.&nbsp;

BenchRocker™ 3D Nutating Shaker, variable speed, 12"x12" platform

The B3D2300 by Benchmark Scientific is a variable-speed 3D nutating shaker with a 12 x 12 in. platform, 2-30 rpm, and 0-30 degree InstaTILT adjustment (no tools). Load capacity: 4.4 lbs. Cold room and incubator compatible (+4 to +45 degrees C). Ships with both autoclavable flat and dimpled mats. Brushless motor; 2-year warranty. For blot washing, gel staining, tube mixing, and hybridization.

BenchRocker™ 3D Nutating Shaker, variable speed, 12"x12" platform with 2 mats, 115V

BenchRocker™ 3D Nutating Shaker, variable speed, 12"x12" platform with 2 mats, 230V

BenchWaver™ 3D Rocker with flat mat, 13.5x13" platform

B3D5000 by Benchmark Scientific is the BenchWaver™ 3D Rocker — a variable-speed nutating mixer with 5–105 rpm speed range, 0–±10° Insta-TILT™ tilt adjustment, and a 13.5 x 13" flat mat platform rated to 20 lbs. Cold room and incubator compatible (+4°C to +60°C). Ideal for Western blots, hybridization, ELISA plates, and cell suspension mixing.

Dimensions (WxDxH)

BenchWaver™ 3D Rocker with flat mat, 13.5x13" platform, 100-240V (US Plug)

BenchWaver™ 3D Rocker with flat mat, 13.5x13" platform, 100-240V (European 2 prong plug)

Agarose

<h2>What is agarose for gel electrophoresis?</h2>
&nbsp;
Agarose is a linear polysaccharide derived from agar that, when dissolved in hot buffer and allowed to cool, forms a porous gel matrix whose pore size is determined by the agarose concentration. DNA and RNA molecules migrate through this matrix under an electric field at a rate inversely related to their size, allowing fragments of different lengths to be separated and visualized as distinct bands.
&nbsp;
<h2 dir="ltr">What you will find:</h2>
&nbsp;
<ul>
<li dir="ltr" role="presentation">Azura Agarose for routine electrophoresis of nucleic acids with low electroendosmosis (EEO) performance</li>
<li dir="ltr" role="presentation">Benchmark Agarose for PCR product analysis and high-quality nucleic acid separation</li>
<li dir="ltr" role="presentation">Benchmark Specialty Agarose for specialized gel applications requiring enhanced resolution and performance control</li>
<li dir="ltr" role="presentation">Standard Agarose for routine use in gel electrophoresis workflows</li>
<li dir="ltr" role="presentation">EZ Pack&trade; Agarose Tablets for agarose concentration control and convenient gel preparation&nbsp;</li>
</ul>
&nbsp;
<h2>How to choose agarose type and concentration</h2>
&nbsp;
Use standard agarose at 0.7&ndash;1% for routine PCR and restriction digest checks on larger fragments
A 0.7&ndash;1% standard agarose gel is commonly used for routine PCR product verification and restriction digest analysis when fragments are generally in the 1&ndash;10 kb size range.
Use 1.5&ndash;2% standard agarose for resolving smaller fragments in the 200 bp&ndash;2 kb range
Higher agarose concentrations from 1.5% to 2% are appropriate for resolving smaller PCR products, SNP genotyping amplicons, or restriction digests where size differences below 500 bp need to be clearly distinguished.
Use high-resolution agarose at 2&ndash;4% for very small fragments or close sizing
High-resolution agarose formulations can differentiate closely sized DNA fragments in the 50&ndash;500 bp range more effectively than standard agarose, making them useful for applications such as microsatellite or STR analysis.
Choose low-melting-point agarose when you need to recover DNA from gel slices
Low-melting-point (LMP) agarose can be melted at approximately 65&deg;C after electrophoresis, allowing DNA-containing gel slices to be processed more easily for downstream enzymatic reactions or purification workflows.
Confirm agarose purity (EEO grade) for sensitive applications
Electro-endosmosis (EEO) reflects agarose purity. Low-EEO agarose supports more consistent DNA migration and helps minimize contaminants that may interfere with downstream PCR amplification, restriction digestion, or other enzymatic applications.
&nbsp;
<h2>Specifications context</h2>
&nbsp;
Standard agarose gels are typically prepared by dissolving agarose powder in TAE or TBE buffer through heating, followed by cooling to approximately 55&deg;C before pouring into casting trays. Higher-concentration gels solidify more rapidly and generally benefit from prompt casting.
As of 2026, low-EEO agarose grades remain the preferred choice for sensitive applications such as Southern blotting, gel extraction followed by PCR, and restriction enzyme digestion workflows where contaminants can inhibit downstream reactions.
<a href="https://mbpinc.net/contact-us">Contact the expert team</a> and get premium agarose gel for your research today.

Benchmark Agarose LE (Molecular Biology Grade)

Benchmark Agarose LE (A1705) by MBP is a low EEO molecular biology-grade agarose powder for standard DNA and RNA gel electrophoresis. Compatible with TAE/TBE buffers and all common gel stains. Available in three pack sizes: A1705, A1701, and A1700. Stores at room temperature. Ships ambient.

Manufacturer

Benchmark Agarose LE, 500g

Benchmark Agarose LE, 100g

Benchmark Agarose LE, 25g

Dry Baths

<h2>What Are Dry Bath Incubators?</h2>
&nbsp;
A dry bath incubator uses direct thermal conduction from a heated aluminum block to sample tubes placed in precision-machined well inserts, rather than immersing samples in a liquid medium. This eliminates water bath contamination risks from microbial biofilms, cross-contamination between samples from water droplets, and the mineral scale buildup associated with tap water. Aluminum blocks heat rapidly: most models reach 37 degrees C from ambient in 3-5 minutes and 100 degrees C in approximately 10-15 minutes, providing faster protocol transitions than water baths for multi-temperature workflows. Interchangeable aluminum well insert blocks are machined to fit specific tube formats with tight tolerances (typically plus or minus 0.1 mm), maximizing thermal contact between the block wall and tube exterior for efficient and uniform heat transfer. Choose dry bath incubators over water baths when contamination prevention is critical, when multiple setpoint temperatures are needed in rapid succession, or when protocols require temperatures above 70 degrees C, where evaporation from water baths is significant.
&nbsp;
<h2 dir="ltr">What You Will Find:</h2>
&nbsp;
<a href="https://mbpinc.net/equipments/temperature-control-equipment/temperature-controlled-baths/dry-baths/dry-baths-accessories" title="Dry Baths Accessories">Dry Baths Accessories</a>
<ul>
<li dir="ltr" role="presentation">High-conductivity interchangeable heating blocks designed to accommodate microtubes, PCR strips, and centrifuge tubes for maximum versatility.</li>
<li dir="ltr" role="presentation">Specialized block lifters and thermal covers that ensure safe handling and improved temperature insulation during high-heat protocols.</li>
<li dir="ltr" role="presentation">Precision-fit modular inserts engineered for seamless heat transfer, allowing you to customize your heating station for any vessel size.</li>
</ul>
&nbsp;
<h2>How to Choose a Dry Bath Incubator</h2>
&nbsp;
Number of blocks and block capacity
Single-block dry baths hold one aluminum insert block and typically accept 8-24 wells, depending on tube size, occupying minimal bench space. Dual-block models accept two independently controlled blocks simultaneously (see Dual Baths), enabling two temperatures in one footprint. Four-block configurations (such as Labnet DB-04A) hold four blocks with a broad temperature range up to 150 degrees C, suitable for high-throughput labs processing multiple protocols simultaneously. Confirm well count per block for your primary tube format before purchasing.
Temperature range
Standard dry bath incubators cover ambient plus 5 degrees C to 100 degrees C, sufficient for most molecular biology protocols (37 degrees C incubation, 55-60 degrees C Proteinase K digestion, 70 degrees C inactivation, 95 degrees C DNA denaturation). Extended-range models reach 120-160 degrees C for applications such as paraffin embedding at 60-65 degrees C, wax melting, electrophoresis gel denaturation, and COD (chemical oxygen demand) digestion at 150 degrees C. Models with Peltier cooling blocks extend the lower range to -10 to -30 degrees C for sub-ambient incubations.
Temperature accuracy and uniformity
Block temperature accuracy (deviation from the true temperature at setpoint) is typically plus or minus 0.2-0.5 degrees C at 37 degrees C for microprocessor PID-controlled units; the Biolab dry bath incubator 1306 series specifies plus or minus 0.3 degrees C stability and or minus 0.3 degrees C block uniformity at 100 degrees C. Block uniformity describes the temperature variation between different wells in the same insert at the same setpoint, a critical specification when running comparative assays where all samples must be at identical temperatures.
Heated lid
An adjustable heated lid positions a temperature-controlled surface directly above the tube caps during incubation, preventing condensation of volatile samples on the cooler upper portions of the tube and the cap. Heated lids are essential for enzyme reactions, isothermal amplification (LAMP), immunoassay incubations, and any protocol where evaporation or condensation affects sample concentration or reaction outcome. Models like the Labnet PR1MA Mini with Heated Lid allow independent temperature setting of the lid to optimize anti-condensation heating without overheating the sample.
Programmable timer and multi-cycle function
Programmable dry baths with a built-in timer (up to 99 hours and 59 minutes on most models) allow unattended protocol completion with automatic shutoff. Multi-cycle function (up to 99 repetitions) enables automated ramp-hold-repeat cycles for denaturation-renaturation experiments, isothermal nucleic acid amplification protocols, and temperature cycling without a PCR thermocycler for simple two-step protocols. Auto-restart after power failure is standard on research-grade models.
&nbsp;
<h2>Specifications Context</h2>
&nbsp;
A 150 W heating element in a single-block dry bath achieves temperature equilibration from 25 degrees C to 100 degrees C in 10 minutes or less, compared to 15-25 minutes for a 12-20 L water bath at comparable setpoints. Block temperature uniformity of plus or minus 0.3 degrees C across all wells is standard for research-grade dry bath incubators; economy models may specify plus or minus 1 degree C block uniformity, which is insufficient for quantitative assays comparing samples run in different wells. Dry bath incubators operating at 95-100 degrees C require minimal maintenance compared to water baths: no water changes, no algae treatment, no mineral descaling, making them operationally lower-cost for high-temperature molecular biology protocols. Dry bath incubators with heated lids, dual LED displays (showing actual and setpoint temperatures simultaneously), and programmable multi-cycle timers are the standard specification for new molecular biology lab installations, replacing older dry block heaters.&nbsp;
&nbsp;
Ready to upgrade your sample heating setup? Explore our full range of dry baths and <a href="https://mbpinc.net/contact-us">contact the MBP team</a> for a quote today.

Custom drilling for BSW01 (sold separately),  up to 36 holes

Block, 48 x 0.2ml tubes or 6 PCR strips of 8 tubes each

Block, 24 x1.5ml centrifuge tubes (conical)

Block, 24 x 1.5ml or 2.0ml centrifuge tubes

Block, 12 x 5.0ml centrifuge tubes (17mm diameter)

Block, 20x10mm test tubes or 20×2.0ml centrifuge tubes

Block, Blood Collection tubes, 12 x 13mm and 8 x 16mm

Quick-Flip™ Block, 24 x 1.5ml tubes, or 32 x 0.2ml and 14 x 0.5ml tubes

Block, PCR plate 96 x 0.2ml, skirted or non-skirted For 1-block dry bath only

Block, PCR plate 96 x 0.2ml, skirted or non-skirted For 2 or 4-block dry bath only

Block, Micro Titer Plate, skirted or non-skirted For 2 or 4-block dry bath only

Block, 48 X hematocrit tubes, 1.9mm (not compatible with cover)

Block, for Microtube Strips (2.0ml)  6 strips

Benchmark Digital Dry Bath, single position, without blocks Accessories

Benchmark Dry Bath Heat Blocks

BSH1001 by Benchmark Scientific is a single-block digital dry bath incubator covering ambient +5°C to 150°C at ±0.2°C accuracy with a 1–999 min built-in timer. The 20 × 23 × 8 cm instrument accepts all BSH100-series interchangeable aluminum blocks — PCR tubes, 1.5/2.0 mL conicals, cuvettes, and custom formats — for enzyme digestion, denaturation, LAMP, and bead assay incubations. Blocks sold separately.

Temperature Range

Temperature Accuracy

Temperature Uniformity

Temperature Increments

Timer

Dimensions (Single)

Dimensions (Dual)

Dimensions (Four)

One-Block Digital Dry Bath 115V

One-Block Digital Dry Bath, 230V

Two-Block Digital Dry Bath 115V

Two-Block Digital Dry Bath, 230V

Four-Block Digital Dry Bath 115V

Four-Block Digital Dry Bath, 230V

<h2>What Are Centrifuge Tubes?</h2>
 Centrifuge tubes are cylindrical laboratory containers with caps that are used to separate, pellet, and store biological or chemical samples through centrifugal force. They are commonly made from polypropylene (PP) or polystyrene (PS) and are available in sizes ranging from small 0.5 mL microtubes to larger 50 mL conical tubes. These tubes are widely used for cell pelleting, protein precipitation, DNA and RNA extraction, tissue homogenate clarification, and long-term sample storage. Depending on the material, they can withstand temperatures from &minus;80 &deg;C to +121 &deg;C.
In short, the best centrifuge tube depends on your centrifuge rotor, required g-force, sample volume, and sterility needs. 
<h2>What You Will Find: </h2>
<ul>
<li><a href="https://mbpinc.net/consumables/centrifuge-tubes/all-centrifuge-tubes" title="All Centrifuge Tubes">All Centrifuge Tubes</a>: Comprehensive selection of 15 mL and 50 mL conical tubes with clear graduations for daily lab workflows.</li>
<li><a href="https://mbpinc.net/consumables/centrifuge-tubes/oak-ridge-style-centrifuge-tubes" title="Oak Ridge Style Centrifuge Tubes">Oak Ridge Style Centrifuge Tubes</a>: High-speed, chemical-resistant tubes designed to withstand extreme RCF without deformation.</li>
<li><a href="https://mbpinc.net/consumables/centrifuge-tubes/centrifuge-bottles" title="Centrifuge Bottles">Centrifuge Bottles</a>: Heavy-duty, larger-capacity vessels engineered for bulk sample processing and high-velocity runs.</li>
<li><a href="https://mbpinc.net/consumables/centrifuge-tubes/large-volume-centrifuge-tubes" title="Large Volume Centrifuge Tubes">Large Volume Centrifuge Tubes</a>: Industrial-strength 250 mL and 500 mL tubes optimized for pilot-scale harvesting and bioprocessing.</li>
</ul>
&nbsp;
<h2>How to Choose Centrifuge Tubes</h2>
 Volume and Rotor Compatibility
Select a tube size that matches both your sample volume and centrifuge rotor. Microtubes ranging from 0.5&ndash;2 mL are commonly used in microcentrifuges and can typically handle speeds up to 20,000 &times; g. Midi tubes in the 5&ndash;10 mL range are suitable for intermediate sample volumes, while 15 mL and 50 mL conical tubes are commonly used in clinical, research, and preparative centrifuges.
Material: Polypropylene vs. Polystyrene
Polypropylene (PP) tubes offer excellent chemical resistance and can tolerate temperatures from &minus;80 &deg;C to +121 &deg;C. They are suitable for autoclaving and exposure to many laboratory solvents. Polystyrene (PS) tubes provide superior optical clarity, making it easier to visually inspect samples and liquid levels, but they have lower resistance to solvents and extreme temperatures.
Sterility and Contamination Control
Sterile centrifuge tubes are typically gamma- or E-beam-irradiated and certified free of RNase, DNase, and pyrogens. These tubes are recommended for RNA extraction, cell culture, and clinical applications where contamination must be minimized. Non-sterile tubes may still be RNase- and DNase-free and are often suitable for routine DNA work and general sample storage.
Cap Design
Attached screw caps help prevent cap mix-ups and sample contamination, especially in high-throughput laboratories. Separate caps can be quicker to open and may be preferred in workflows that require frequent access to samples. If tubes will be used with automated systems, cap dimensions should be verified for compatibility with liquid handling equipment.
Packaging Options
Racked tubes provide convenient organization and allow direct pipetting while the tubes remain in the rack. Bulk-bagged tubes offer a more economical option for laboratories that process large volumes of samples and already have tube storage systems in place.
<h2> Comparing Common Centrifuge Tube Types</h2>
 Microtubes (0.5&ndash;2 mL) are ideal for PCR preparation, microcentrifuge applications, and storage of small sample volumes. They can generally withstand centrifugal forces up to 20,000 &times; g.
Midi tubes (5&ndash;10 mL) are designed for intermediate sample volumes such as culture supernatants and can typically tolerate forces up to 16,000 &times; g.
Sterile 15 mL conical tubes are frequently used for cell pelleting, RNA extraction, and clinical sample processing, with typical ratings between 12,000 and 15,000 &times; g.
Sterile 50 mL conical tubes are commonly selected for larger-volume applications including tissue culture work, density gradient preparation, and large-scale sample processing.
Polystyrene conical tubes in 15 mL and 50 mL formats are often chosen when visual sample inspection is important and solvent exposure is minimal.
<h2> Specifications and Features</h2>
 Polypropylene centrifuge tubes from Globe Scientific and Nest Scientific are manufactured from USP Class VI virgin resin and do not contain plasticizers or processing additives. Sterile products are typically irradiated to achieve a sterility assurance level (SAL) of 10⁻⁶. Most 15 mL tubes feature graduation marks at 1 mL intervals, while 50 mL tubes are usually graduated every 5 mL. MBP offers both bagged and racked centrifuge tube formats, including 15 mL and 50 mL conical tubes as well as smaller microtube and midi tube options.
MBP supports procurement departments by accepting purchase orders and offering institutional pricing for qualified high-volume customers. <a href="https://mbpinc.net/contact-us">Contact the MBP team today</a> for a customized quote.

Centrifuge Tubes

<h2 data-section-id="155qizo" data-start="0" data-end="33">What Are All Centrifuge Tubes?</h2>
&nbsp;
The All Centrifuge Tubes collection includes the complete range of tube sizes commonly used in research, clinical, and laboratory environments. These tubes range from small 0.5 mL and 1.5&ndash;2 mL microtubes used in microcentrifuge applications to 5 mL and 10 mL midi tubes for intermediate sample volumes, as well as 15 mL and 50 mL conical tubes designed for cell culture, density gradient preparation, and larger-volume sample processing. They are available in polypropylene (PP) for enhanced chemical resistance and temperature tolerance or polystyrene (PS) for improved optical clarity.
&nbsp;
What you will find:
&nbsp;
<ul>
<li dir="ltr" aria-level="1">
<a href="https://mbpinc.net/consumables/centrifuge-tubes/all-centrifuge-tubes/microcentrifuge-tubes" title="Microcentrifuge Tubes">Microcentrifuge Tubes</a> &ndash; Precision-engineered for small-volume sample preparation.
</li>
<li dir="ltr" aria-level="1">
<a href="https://mbpinc.net/consumables/centrifuge-tubes/all-centrifuge-tubes/screw-cap-tubes" title="Screw Cap Tubes">Screw Cap Tubes</a> &ndash; Secure, leak-proof closures for long-term storage and transport.
</li>
<li dir="ltr" aria-level="1">
<a href="https://mbpinc.net/consumables/centrifuge-tubes/all-centrifuge-tubes/15ml-and-50ml-centrifuge-tubes" title="15ml &amp; 50ml Centrifuge Tubes">15ml &amp; 50ml Centrifuge Tubes</a> &ndash; Standard conical bottom tubes for large-volume processing.
</li>
<li dir="ltr" aria-level="1">
<a href="https://mbpinc.net/consumables/centrifuge-tubes/all-centrifuge-tubes/midicentrifuge-tubes-5ml-and-10ml" title="Midicentrifuge Tubes (5ml &amp; 10ml)">Midicentrifuge Tubes (5ml &amp; 10ml)</a> &ndash; The perfect bridge for intermediate sample sizes.
</li>
<li dir="ltr" aria-level="1">
<a href="https://mbpinc.net/consumables/centrifuge-tubes/all-centrifuge-tubes/microtubes-box" title="Microtubes Box">Microtubes Box</a> &ndash; Durable storage racks for organized sample management and protection.
</li>
</ul>
&nbsp;
<h2 data-section-id="1f93yys" data-start="914" data-end="963">How to Choose From All Centrifuge Tube Formats</h2>
&nbsp;
Volume and Rotor Compatibility
Selecting the correct tube size is essential for safe and efficient centrifugation. Microtubes ranging from 0.5&ndash;2 mL are designed for microcentrifuges, while 5&ndash;10 mL midi tubes fit compatible benchtop centrifuge rotors. Larger 15 mL and 50 mL conical tubes are commonly used in clinical and research centrifuges. Always verify rotor compatibility before introducing a new tube format into your workflow.
Sterility Requirements
For sensitive applications such as RNA extraction, cell culture, and clinical diagnostics, sterile tubes certified free of RNase, DNase, and pyrogens are recommended. Non-sterile tubes can provide a cost-effective solution for routine DNA analysis, protein assays, and general sample storage where sterility is not critical.
Material Selection
Polypropylene tubes offer excellent durability, can be autoclaved at 121 &deg;C, and resist many laboratory chemicals and solvents. Polystyrene tubes provide superior transparency, making it easier to monitor liquid levels and sample contents, although they are less resistant to heat and solvents.
Packaging and Inventory Planning
Microtubes are commonly available in pack sizes ranging from 500 to 1,000 units, while 15 mL and 50 mL conical tubes are often supplied in cases of 500. Laboratories with consistent usage may benefit from establishing recurring purchase orders to ensure uninterrupted supply.
&nbsp;
<h2 data-section-id="urfo3f" data-start="2395" data-end="2433">Compare Centrifuge Tube Size Groups</h2>
&nbsp;
Microtubes (0.5&ndash;2 mL) are primarily used for PCR preparation, microcentrifuge applications, and storage of small sample volumes. These are typically manufactured from polypropylene and are available in pack sizes of 500&ndash;1,000 units.
Midi tubes (5&ndash;10 mL) support intermediate-volume centrifugation and supernatant collection. They are commonly made from polypropylene and supplied in packs ranging from 100&ndash;500 units.
15 mL conical tubes are widely used for cell pelleting, RNA isolation, and clinical sample processing. They are available in both polypropylene and polystyrene formats and are generally packaged in cases of 500.
50 mL conical tubes are designed for larger-volume workflows, including tissue culture, density gradient preparation, and sample processing. Like 15 mL tubes, they are available in polypropylene and polystyrene and are commonly sold in cases of 500.
&nbsp;
<h2 data-section-id="1ezckh3" data-start="3318" data-end="3348">Specifications and Features</h2>
&nbsp;
Globe Scientific and Nest Scientific centrifuge tubes are manufactured from USP Class VI virgin polypropylene or polystyrene resin and are certified free from detectable RNase, DNase, and pyrogens. Sterile products are irradiated using gamma or E-beam methods to achieve a sterility assurance level (SAL) of 10⁻⁶. MBP offers both racked and bagged formats for 15 mL and 50 mL conical tubes, along with dispenser-box options for selected microtube product lines that support efficient use in high-throughput laboratory environments.
For procurement teams, MBP accepts purchase orders and offers institutional pricing for bulk and high-volume purchases. <a href="https://mbpinc.net/contact-ushttps://mbpinc.net/contact-us" title="Contact the MBP team" style="color: #236fa1;">Contact the MBP team</a> today to learn more

All Centrifuge Tubes

<h2 data-section-id="kx7ycn" data-start="0" data-end="39">What Are Screw Cap Centrifuge Tubes?</h2>
&nbsp;
Screw cap centrifuge tubes are polypropylene vessels with a threaded closure that rotates to create a compression seal, typically reinforced by a silicone or polyethylene O-ring. This seal design prevents evaporation, leakage, and contamination under conditions where a snap cap fails, including high-speed centrifugation up to 20,000 &times; g, repeated freeze-thaw cycles from &minus;80 &deg;C to +121 &deg;C, exposure to volatile organic solvents, and long-term cryogenic storage. Available in volumes ranging from 0.5 mL to 2.0 mL, these tubes are commonly used in proteomics, genomics, drug discovery, biobanking, and other applications where maintaining sample integrity is critical throughout multiple processing steps.
Choose screw cap tubes instead of snap-cap tubes when working with volatile samples, repeated freeze-thaw cycles, high centrifugal forces above 16,000 &times; g, or long-term storage at &minus;80 &deg;C.
<h2 dir="ltr">&nbsp;</h2>
<h2 dir="ltr">In this part, you will discover:</h2>
&nbsp;
<ul>
<li dir="ltr" aria-level="1">
0.5mL, 1.5mL, 2.0mL (for small to moderate volume applications)
</li>
</ul>
<ul>
<li dir="ltr" aria-level="1">
O-ring caps: Leak-proof, prevents evaporation
</li>
<li dir="ltr" aria-level="1">
Tubes only: Compatible with existing caps
</li>
</ul>
<ul>
<li dir="ltr" aria-level="1">
Sterile: For sensitive, contamination-prone work
</li>
<li dir="ltr" aria-level="1">
Non-sterile: Cost-effective for routine use
</li>
</ul>
&nbsp;
<h2 data-section-id="1w7d404" data-start="949" data-end="981">How to Choose Screw Cap Tubes</h2>
&nbsp;
O-Ring vs Non-O-Ring Seal
Screw cap tubes with integrated silicone O-rings provide a hermetic seal that is ideal for volatile chemicals, infectious materials, and valuable samples where evaporative loss must be minimized. Non-O-ring designs, including rim-seal and plug-seal caps, are suitable for most routine molecular biology storage applications at temperatures between &minus;20 &deg;C and &minus;80 &deg;C and are often easier to open when working in cold environments.
Internal Thread vs External Thread
Internal-thread screw cap tubes maintain a smooth exterior profile and are generally compatible with standard microcentrifuge rotors without requiring additional adapters. External-thread designs provide easier cap handling while wearing gloves and are frequently used in self-standing tube formats that can be placed directly in racks.
Volume Selection: 0.5 mL vs 1.5 mL vs 2.0 mL
0.5 mL screw cap tubes are commonly used for concentrated enzymes, antibodies, and other valuable reagents where minimizing dead volume is important.
1.5 mL screw cap tubes are the standard choice for molecular biology applications, including RNA and DNA storage, pellet recovery, and protein fraction collection.
2.0 mL screw cap tubes provide additional capacity and headspace for bead-based extraction methods, precipitation workflows, and sample mixing procedures.
Nest Scientific offers 0.5 mL, 1.5 mL, and 2.0 mL self-standing screw cap tubes with multiple cap color options to simplify sample identification and organization.
Sterility Grade
Sterile screw cap tubes are gamma- or E-beam-irradiated to a sterility assurance level (SAL) of 10⁻⁶ and are recommended for RNA applications, clinical specimen processing, and cell culture workflows. Non-sterile RNase-free and DNase-free tubes provide a cost-effective alternative for DNA and protein-related applications.
&nbsp;
<h2 data-section-id="ibka1i" data-start="2868" data-end="2901">Compare Screw Cap Tube Options</h2>
&nbsp;
Nest Scientific self-standing screw cap tubes are available in 0.5 mL, 1.5 mL, and 2.0 mL volumes with external threads and integrated sealing rings. Rated up to 20,000 &times; g, these tubes are ideal for general sample storage and laboratories that use color-coded organization systems.
Globe Scientific self-standing screw cap tubes with silicone O-rings are offered in 1.5 mL and 2.0 mL formats. Their enhanced sealing performance makes them particularly suitable for volatile samples, cryogenic storage, and applications where maximum sample protection is required. These tubes are rated up to 20,000 &times; g.
Conical-bottom screw cap tubes are commonly available in 1.5 mL formats with internal threads and optional sealing systems. Their conical design improves pellet recovery and makes them well suited for precipitation and centrifugation workflows. These tubes can withstand centrifugal forces up to 20,000 &times; g.
Amber screw cap tubes are available in 1.5 mL and 2.0 mL capacities and feature O-ring seals for additional protection. Designed for light-sensitive samples, they are typically rated up to 16,000 &times; g and help protect reagents from light-induced degradation.
&nbsp;
<h2 data-section-id="1jl751w" data-start="4094" data-end="4119">Specifications Context</h2>
&nbsp;
Globe Scientific and Nest Scientific screw cap microtubes are manufactured from USP Class VI virgin polypropylene and are certified RNase-free, DNase-free, and non-pyrogenic by lot. Nest Scientific screw cap tubes are available with six cap color options, including blue, red, yellow, purple, green, and natural, and are typically packaged in packs of 50 tubes with 500 tubes per case. These tubes are suitable for temperatures ranging from &minus;80 &deg;C to +121 &deg;C.
As of 2026, MBP stocks both self-standing and conical-bottom screw cap tube formats from Globe Scientific and Nest Scientific. Availability may vary by volume, cap style, and color configuration.
Don't let equipment choices hold back your next breakthrough. <a href="https://mbpinc.net/contact-us" style="color: #236fa1; text-decoration: underline;">Contact our team at Molecular Biology Products Inc.</a> for a custom quote.

Screw Cap Tubes

<h2 data-section-id="1k6o3gy" data-start="0" data-end="50">What Are Midicentrifuge Tubes (5 mL and 10 mL)?</h2>
&nbsp;
Midicentrifuge tubes are polypropylene conical tubes available in 5 mL and 10 mL capacities, designed for laboratory workflows that require sample volumes larger than standard microtubes but smaller than traditional 15 mL conical tubes. These tubes provide an efficient solution for intermediate-volume applications and are commonly used in cell culture, protein purification, gradient fraction collection, virus concentration, and clinical specimen processing.
By filling the gap between 2 mL microcentrifuge tubes and 15 mL conical tubes, midi tubes help optimize sample handling and centrifugation efficiency while reducing unnecessary tube volume and excess headspace.
Midicentrifuge tubes are ideal for sample volumes between approximately 2 mL and 12 mL, especially when a 15 mL conical tube is too large for the application or incompatible with the available rotor setup.
&nbsp;
<h2 dir="ltr">What you will find in this section:</h2>
&nbsp;
<ul>
<li dir="ltr" aria-level="1">Sterility options: Sterile (for sensitive work) &amp; Non-sterile (for routine use)</li>
</ul>
<ul>
<li dir="ltr" aria-level="1">
Bag packed: Economical, space-saving
</li>
<li dir="ltr" aria-level="1">
Racked: Organized, ready-to-use
</li>
</ul>
<ul>
<li dir="ltr" aria-level="1">
Attached screw cap: No mix-ups, convenient
</li>
<li dir="ltr" aria-level="1">
Assembled screw cap: Pre-fitted, time-saving
</li>
<li dir="ltr" aria-level="1">
Separate screw cap: Flexible handling for workflows
</li>
</ul>
&nbsp;
<h2 data-section-id="1vogm0p" data-start="945" data-end="982">How to Choose Midicentrifuge Tubes</h2>
&nbsp;
Selecting the Appropriate Volume
The choice between 5 mL and 10 mL tubes depends on the volume of your samples and workflow requirements.
5 mL midi tubes are well suited for applications involving smaller sample volumes, typically below 4.5 mL. They minimize excess headspace and can improve pellet formation during lower-speed centrifugation procedures.
10 mL midi tubes are commonly used for larger intermediate-volume applications, including culture supernatant collection, protein purification workflows, and virus concentration protocols requiring volumes between 6 mL and 10 mL.
Rotor Compatibility
Before purchasing midi tubes, verify that your centrifuge rotor or adapter system is designed to accommodate 5 mL or 10 mL formats. While many benchtop centrifuges support these tubes through dedicated adapters, compatibility varies by manufacturer and rotor model.
The standard dimensions of Globe Scientific 10 mL centrifuge tubes are compatible with many commonly used conical tube adapters found in research and clinical laboratories.
Sterility and Cap Design
Sterile midi tubes with attached screw caps are recommended for cell culture, clinical specimens, and applications where contamination control is essential. Attached caps also reduce the risk of sample mix-ups and accidental contamination.
Non-sterile tubes with separate caps may offer a more economical option for routine laboratory procedures where sterility is not required.
Packaging Considerations
Most midi tubes are supplied in bagged packaging rather than racks. A common configuration includes 100 tubes per bag, making them suitable for laboratories that process moderate to high sample volumes. Reviewing expected usage rates can help determine appropriate ordering quantities and inventory levels.
&nbsp;
<h2 data-section-id="um8esp" data-start="2800" data-end="2829">Compare Midi Tube Variants</h2>
&nbsp;
10 mL Polypropylene Midi Tubes with Attached Screw Caps These sterile tubes are commonly used for clinical specimens, cell culture supernatants, and protein purification workflows. The attached cap design enhances sample security and handling convenience.
5 mL Polypropylene Midi Tubes with Attached Caps Available in sterile and non-sterile formats, these tubes are suitable for gradient fraction collection, low-volume sample preparation, and intermediate-volume centrifugation procedures.
Non-Sterile Midi Tubes with Separate Caps Designed for routine laboratory applications where contamination control is less critical, these tubes provide a cost-effective option for general-purpose centrifugation workflows.
&nbsp;
<h2 data-section-id="1ezckh3" data-start="3567" data-end="3597">Specifications and Features</h2>
&nbsp;
Globe Scientific midicentrifuge tubes are manufactured from high-quality polypropylene and are certified RNase-free and DNase-free. The conical-bottom design promotes efficient sample recovery and pellet formation, while the polypropylene construction provides excellent chemical resistance and temperature stability from &minus;80 &deg;C to +121 &deg;C.
Sterile 10 mL Globe Scientific tubes are supplied with attached screw caps and are commonly packaged with 100 tubes per bag. Globe Scientific operates under ISO 9001:2015 quality standards to ensure consistent manufacturing and product performance.
MBP carries Globe Scientific 10 mL midicentrifuge tubes and may offer additional 5 mL options depending on current inventory availability.
Have questions about the best fit for your workflow?&nbsp;<a href="https://mbpinc.net/contact-us">Contact the Molecular Biology Products Inc. team </a>for a quick quote.

Midicentrifuge Tubes (5ml & 10ml)

Benchmark Scientific 5mL Microcentrifuge Tubes with Screw Cap

Cap Type

Bottom Style

Material

sterility

feature

graduation

packaging

manufacturer

capacity

tube diam.

suitability

5mL Tubes, non-sterile, w/ screw caps packed separately, pk/500  ( 5 bags of 100)

5ml Screw Cap Tubes, Sterile with caps attached, 50 per rack, (500 total)

5mL Tubes, sterile, w/ attached screw caps in foam racks, Opaque Black, 500ea.

Overhead Stirrers

<h2>What Are Overhead Stirrers?</h2>
&nbsp;
An overhead stirrer is a laboratory mixing instrument that mounts a motor unit above the sample vessel on a stand or clamp, driving a rotating shaft and impeller that is immersed directly into the liquid. Unlike magnetic stirrers, which rely on a rotating magnetic field to spin a small bar inside the vessel, overhead stirrers use direct mechanical drive: the motor connects to the impeller shaft through a chuck or collet, allowing the motor to deliver consistent torque to the sample regardless of viscosity changes during mixing. This makes overhead stirrers the correct choice for applications where a magnetic stir bar would stall or decouple: polymerization reactions, emulsion preparation, gel dispersion, cell suspension in bioreactors, slurry processing, and large-volume buffer and media preparation. Digital overhead stirrers with brushless DC motors, torque display, programmable speed ramps, reversible rotation, and overload protection are standard research-grade configurations covering volumes to 200 L. Switch from a magnetic stirrer to an overhead stirrer when the sample volume exceeds 2 L, viscosity exceeds roughly 2,000 mPas (similar to glycerol), or the stir bar stalls during the mixing process.
&nbsp;
<h2 dir="ltr">What You Will Find:</h2>
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<div class="markdown prose dark:prose-invert wrap-break-word w-full light markdown-new-styling">
<ul>
<li>Digital overhead stirrers for laboratory mixing and sample preparation applications.</li>
<li>Stainless steel propellers available in one-line, four-arm, paddle with flat holes, and centrifugal impeller designs.</li>
<li>PTFE (Teflon) propellers offered in one-line, four-arm, paddle with flat holes, and centrifugal impeller configurations.</li>
<li>Optional interchangeable propellers allow optimization of mixing performance for different sample types and viscosities.</li>
<li><a href="https://mbpinc.net/equipments/temperature-control-equipment/hotplate-and-stirrers/overhead-stirrers/overhead-stirrer-accessories">Overhead stirrer accessories</a> support routine laboratory stirring, blending, and homogenization tasks.</li>
</ul>
</div>
</div>
</div>
</div>
</div>
</div>
</section>
</div>
&nbsp;
<h2>How to Choose an Overhead Stirrer</h2>
&nbsp;
Torque capacity
Torque (measured in N &middot; cm) is the most important selection criterion for overhead stirrers. The motor must maintain its setpoint rpm against the resistance of the sample throughout the mixing process, including at points of highest viscosity (e.g., during emulsion formation or cooling of a polymer melt). Common torque classes are 20 Ncm, 40 Ncm, and 75 Ncm for lab-scale models. High-viscosity applications (pastes, gels above 10,000 mPas) require 40 Ncm or more. Models with a real-time torque display let the operator monitor process state during mixing; torque reaching a setpoint can signal batch completion.
Speed range
Low-speed overhead stirrers (12 to 300 rpm) are used for gentle laminar flow mixing and tangential agitation of high-viscosity materials to prevent air entrainment. Mid-range models (60 to 2,000 rpm) handle general stirring through turbulent flow. High-speed models (up to 6,000 rpm) are used for homogenization, emulsification, and dispersion at small to medium scales. Match the speed range to the flow regime required by the application.
Volume capacity
Overhead stirrers specify maximum volume based on water viscosity at the stated rpm. Actual volume limits for viscous samples are lower. Benchtop models cover 2 L to 15 L; mid-range floor-stand models reach 80 L; large-scale process-development stirrers handle up to 200 L. Confirm that the impeller diameter is appropriate for the vessel diameter in use.
Impeller type
Impeller geometry determines the mixing regime: propeller-type impellers generate axial flow for general liquid blending; paddle and anchor impellers provide tangential flow for high-viscosity materials; dispersing disc impellers create radial high-shear flow for emulsification and dispersion; and ribbon impellers handle very high-viscosity pastes and thickening batches. Impeller shafts and heads are commonly made from stainless steel or PTFE for chemical resistance.
Digital vs. analog control
Digital overhead stirrers display speed in rpm, maintain setpoint through closed-loop motor control, and include overload protection, reversible rotation, and data logging capability. Analog models use a dial for speed setting and provide no readout. For regulated or reproducible workflows, digital control is strongly recommended.
&nbsp;
<h2>Specifications Context</h2>
&nbsp;
Motor type affects long-term reliability: brushless DC (BLDC) motors require no brush replacement, operate quietly, and maintain consistent torque at low speed, which is important for laminar flow applications. Overload protection (automatic speed reduction or shutdown when torque exceeds a setpoint) protects both the motor and the sample from damage during unexpected viscosity increases. Shaft and impeller material should be confirmed for chemical compatibility: stainless steel (grades 304 or 316) suits aqueous and mild organic media; PTFE shafts are required for corrosive acids, bases, and halogenated solvents. Support stands should be rigid enough to prevent shaft wobble at speed; confirm the stand's load rating and reach for the vessel configuration in use.&nbsp;
&nbsp;
Ready to power through your toughest mixing projects? Take a look at our overhead stirrer range and <a href="https://mbpinc.net/contact-us">reach out to the MBP team</a> for a friendly quote today.

Optional propeller, stainless steel paddle with flat holes

Optional propeller, stainless steel centrifugal impeller

Optional propeller, stainless steel one line

Optional propeller, Teflon paddle with flat holes

Optional propeller, Teflon centrifugal impeller

Included propeller, stainless steel 4 arm

Benchmark Scientific Overhead Stirrers

IPS2050-20 by Benchmark Scientific is the OS-20L digital overhead stirrer with a 20-litre mixing capacity, 30–2,200 rpm speed range, 40 Ncm maximum torque, and a DC brushless motor rated for up to 10,000 mPas viscosity. The tool-free 0.5–10 mm feed-through chuck, LCD display, universal 100–240V power input, and IP42 protection make the OS-20L a practical overhead stirrer for large-volume buffer preparation, viscous polymer blending, and bioreactor vessel agitation in research and pilot-scale labs.

Model

Mixing Capacity (H20)

Maximum Torque

Input Power

Output Power

Net Weight (Mixer)

Maximum Viscosity

Motor Type

Chuck Diameter Range

Exterior Dims.

Protection Mode

Ambient Operating Range

OS20L Overhead Stirrer, 20L includes stand, and 4 arm propeller (IPS2050-P-S4), 100 to 240V with US Plug

OS20L Overhead Stirrer, 20L includes stand, and 4 arm propeller (IPS2050-P-S4), 100 to 240V with EU Plug

OS40L Overhead Stirrer, 40L includes stand, and 4 arm propeller (IPS2050-P-S4), 100 to 240V with US Plug

OS40L Overhead Stirrer, 40L includes stand, and 4 arm propeller (IPS2050-P-S4), 100 to 240V with EU Plug

Benchmark Specialty Agarose

Benchmark Specialty Agarose (A1801-LM) by MBP is a specialty agarose available in three variants: A1801-LM, A1801-31, and A1801-HR. Contact MBP for variant-specific information.

Benchmark Agarose LM, Low Melt, 100g

Benchmark Agarose 3:1, 100g

Benchmark Agarose HR, PCR Grade for DNA fragments between 20 to 800bp, 100g

PCR Workstation Accessories

<h2>What Are PCR Workstation Accessories?</h2>
&nbsp;
PCR workstation accessories are the consumable and add-on components that maintain performance and extend the functionality of PCR enclosures: replacement HEPA filters (rated 99.97% at 0.3 &micro;m), replacement 254 nm UV-C lamps, carbon pre-filters for three-stage filtration systems, arm rests for operator ergonomics, side panels, and floor stands or mobile carts. All are model-specific&mdash;filter dimensions, lamp socket type, and wattage must match the original OEM specification to preserve the ISO 5 air environment and UV decontamination efficacy that the workstation was designed to deliver.
&nbsp;
<h2 dir="ltr">What you will find:</h2>
&nbsp;
<ul>
<li dir="ltr" style="font-family: helvetica, arial, sans-serif;" aria-level="1">
Benchmark SureAir replacement prefilter: for maintaining clean airflow
</li>
<li dir="ltr" style="font-family: helvetica, arial, sans-serif;" aria-level="1">
Benchmark SureAir replacement filter: for effective contamination control
</li>
</ul>
&nbsp;
<h2>How to Choose PCR Workstation Accessories</h2>
&nbsp;
Identify Exact Model Before Ordering
HEPA filter cassette dimensions, carbon pre-filter dimensions, and lamp socket specifications vary between manufacturers (AirClean Systems, Mystaire, Labconco Purifier, UVP/Analytik Jena) and between model widths within the same brand. The filter part number is usually printed on the existing filter label or listed in the workstation user manual; always confirm before ordering a replacement.
HEPA Filter Grade
Confirm the replacement HEPA filter meets the same efficiency rating as the original&mdash;99.97% at 0.3 &micro;m for standard HEPA, or 99.9995% at 0.12 &micro;m for ULPA-grade models. A filter rated below the original specification will not maintain the ISO 5 environment; a filter that is physically compatible but under-specified is the most common source of undetected clean-room failures in PCR workstations.
UV-C Lamp Specifications
The 254 nm UV-C lamp socket type (G5 bi-pin for compact lamps; G13 for T8 lamps), wattage, and physical length must match the OEM lamp. Long-life UV lamps (available from several workstation manufacturers) offer extended replacement intervals and are worth specifying if the workstation runs daily decontamination cycles. Annual output verification with a 254 nm radiometer is still recommended even for long-life lamps.
Carbon Pre-Filter Replacement Interval
Carbon pre-filters in three-stage systems should be replaced every 6&ndash;12 months depending on the chemical load in the lab. A saturated carbon filter no longer removes VOCs or ozone, accelerating degradation of the downstream HEPA filter and potentially introducing off-gassing artifacts into sensitive PCR reactions.
Ergonomic Accessories
Arm rests reduce wrist and forearm fatigue during multi-plate or high-replication PCR setups. Confirm the mounting system (front-lip clip, side rail, or bolt-on) matches the workstation frame before ordering.
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<h2>Specifications Context</h2>
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ISO 5 clean-air performance in a PCR workstation depends on two consumable components maintaining specification simultaneously: the HEPA filter (particle removal) and the UV-C lamp (surface DNA inactivation). As of 2026, some PCR workstation models include electronic filter-life and lamp-life indicators (e.g., AirClean Systems UVTect controller) that alert the operator directly when either consumable requires replacement&mdash;removing reliance on calendar-based schedules in high-use labs. Carbon pre-filters are rated by mass of activated carbon and VOC adsorption capacity; a depleted filter shows no visible sign of saturation and must be replaced on schedule.
Ready to order high-quality PCR workstation accessories? <a href="https://mbpinc.net/contact-us">Contact now with the helpful team</a> of Molecular Biology Products Inc. (MBP) to find the right accessories for your lab.

Benchmark SureAir Replacement Filter

B5200-FIL by Benchmark Scientific is the OEM 99.97% HEPA replacement filter for the SureAir PCR Workstation (B5200), maintaining 0.2 m/s HEPA-filtered airflow at the work surface to protect PCR reactions from amplicon contamination and environmental nucleic acids. Use with B5200-PRE pre-filter to extend service intervals.

Filter

Manufectuer

Benchmark SureAir Replacement Prefilter

B5200-PRE by Benchmark Scientific is the replacement prefilter for the SureAir&trade; PCR Workstation (B5200). The coarse prefilter protects the primary HEPA filter (99.97% at &ge;0.3&nbsp;&micro;m, ISO&nbsp;5 rated) from particulate loading, extending HEPA service life and maintaining 0.2&nbsp;m/s airflow for contamination-free PCR setup environments.

Microcentrifuge

<h2>What Are Microcentrifuges?</h2>
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Microcentrifuges are compact, high-speed benchtop centrifuges designed specifically for 0.2&ndash;2.0 mL microtubes and PCR strips, operating at 10,000&ndash;21,000 &times;g in a fixed-angle rotor. They are the primary centrifugation instrument in molecular biology, biochemistry, and clinical molecular diagnostics labs: nucleic acid pellet formation after ethanol precipitation, spin-column DNA/RNA extraction and PCR cleanup steps (typically specified at 10,000&ndash;16,000 &times;g for 30&ndash;60 seconds), cell debris clearance from lysates, protein precipitation supernatant recovery, and brief sample clarification before downstream analysis. Standard benchtop microcentrifuges reach 14,000&ndash;15,000 RPM (16,000&ndash;21,000 &times;g), while high-speed models reach up to 21,000 RPM and approximately 31,000 &times;g. Refrigerated variants maintain 0&ndash;4&deg;C for temperature-sensitive workflows.
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<h2>What You Will Find:</h2>
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<ul>
<li>High-Speed Microcentrifuges: For faster sample processing</li>
<li>Refrigerated Microcentrifuges: For temperature-sensitive handling</li>
<li>Benchtop Microcentrifuge Systems: For routine lab working</li>
<li>5D Digital Microcentrifuge: With customizable time and speed options</li>
<li>Mini Microcentrifuges: Compact units for rapid spin-down tasks</li>
<li>MC-24 High-Speed Microcentrifuge: Features touch screen control and high speed</li>
<li>Microplate Centrifuges: Developed for PCR plates and strip formats</li>
<li>Microcentrifuge Accessories: For expanded tube flexibility and compatibility</li>
</ul>
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<h2>How to Choose a Microcentrifuge</h2>
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Maximum RCF vs. Protocol Requirements
Most spin-column kit protocols specify 10,000&ndash;16,000 &times;g. A standard microcentrifuge reaching 14,000&ndash;16,000 &times;g covers these requirements. If your lab performs alcohol-precipitation DNA/RNA pelleting (12,000&ndash;16,000 &times;g) or virus concentration steps (20,000+ &times;g), choose a model reaching at least 16,000 &times;g. High-speed models reaching 21,000&ndash;31,000 &times;g are available for specialized applications.
Rotor Tube Positions and Capacity
Most microcentrifuge rotors hold 12&ndash;24 &times; 1.5/2.0 mL tubes per run. Laboratories processing larger batches benefit from 24-position rotors, while smaller research groups may find 12-position models sufficient. Confirm that adapters for 0.5 mL and 0.2 mL tubes are available if required by your workflows.
Refrigerated vs. Ambient Temperature
Refrigerated microcentrifuges are recommended for RNA extraction, protein stability studies, cell viability applications, and any protocol requiring 4&deg;C centrifugation. Standard room-temperature models are suitable for routine DNA extraction and PCR cleanup procedures.
Noise Level and Footprint
Modern brushless DC motor microcentrifuges typically operate at &le;52 dB, making them quieter than older brush-motor systems. Most units occupy 200&ndash;300 mm of bench width, so confirm that sufficient clearance is available when the lid is fully open.
Safety Features
Essential safety features include lid-lock mechanisms, imbalance detection, and over-speed protection. Laboratories handling infectious materials should verify that aerosol-tight sealed rotor lids are available for the selected model.
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<h2>Specifications Context</h2>
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The standard spin-column step in most commercial DNA/RNA extraction kits specifies 10,000&ndash;16,000 &times;g for 30&ndash;60 seconds. Always confirm the rotor's maximum RCF from manufacturer specifications, since RPM values alone do not account for differences in rotor radius.
Microcentrifuge rotors are typically fixed-angle designs positioned at approximately 45&deg;, providing efficient pelleting and short sedimentation paths. Aerosol-tight sealed lids allow safe handling of BSL-2 samples and other applications requiring biocontainment. Modern brushless DC motors offer quieter performance, improved speed accuracy, and longer service intervals than legacy brush-motor systems.
Your search for high-performance microcentrifuges is over. <a href="https://mbpinc.net/contact-us">Contact now</a> with the expert team at Molecular Biology Products Inc. and get the right microcentrifuge for your lab today.

Product literature

Flyer

Benchtop Centrifuge with Swing Buckets, 4000 rpm Accessories

Benchtop Centrifuge with Swing Buckets, 4000 rpm

The Q5120 by ABM (Applied Biological Materials) is a low-speed benchtop centrifuge with 4 swing buckets, covering 100–4,000 rpm / 2,720 × g with a default capacity of 8 × 15 mL and 4 × 50 mL tubes. Optional rotors add 16 × 15 mL, 8 × 50 mL, and 2 × 2 × 96-well ELISA plate configurations. Certified to ISO 13485:2003, CE, REACH, and RoHS.