Benchmark Scientific

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.
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<h2 dir="ltr">What You Will Find:</h2>
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<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>
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<h2>How to Choose an Overhead Stirrer</h2>
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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.
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<h2>Specifications Context</h2>
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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;
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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.

Product Literature

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

Speed Range

Motor Type

Chuck Diameter Range

Exterior Dims.

Protection Mode

Ambient Operating Range

Electrical

Warranty

Manufacture

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

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.
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<h2 dir="ltr">What you will find:</h2>
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Benchmark SureAir replacement prefilter: for maintaining clean airflow
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Benchmark SureAir replacement filter: for effective contamination control
</li>
</ul>
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<h2>How to Choose PCR Workstation Accessories</h2>
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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.
&nbsp;
<h2>Specifications Context</h2>
&nbsp;
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.

Autoclaves

<h2>What Are Laboratory Autoclaves?</h2>
&nbsp;
Laboratory autoclaves (steam sterilizers) use pressurized saturated steam at 121&deg;C or 134&deg;C to destroy all microbial life&mdash;bacteria, viruses, fungi, and heat-resistant bacterial spores&mdash;achieving a validated sterility assurance level (SAL) of 10⁻⁶. At 15 psi above atmospheric pressure, steam reaches 121&deg;C; at 30 psi, it reaches 134&deg;C. Autoclaves are the most widely used sterilization method in research, clinical, and pharmaceutical laboratories for sterilizing glassware, culture media, biohazardous waste, instruments, and porous loads. Two main cycle types are used: gravity-displacement (steam displaces air downward via gravity, suited to liquids and solid instruments) and pre-vacuum (a vacuum pump removes air before steam injection, required for porous, wrapped, and hollow loads).
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<h2 dir="ltr">What you will find:</h2>
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<ul>
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BioClave&trade; Autoclaves: Reliable benchtop autoclaves for routine laboratory sterilization
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Autoclave Printer (115V): Built-in or external printer for cycle data recording and compliance
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<a href="https://mbpinc.net/equipments/autoclave-and-biosafety-cabinets/autoclave/autoclave-accessories">Autoclave Accessories:</a>
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Autoclave Printer Paper (2.25" x 50 ft): Thermal paper rolls for printing sterilization cycle reports
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</ul>
&nbsp;
<h2>How to Choose a Laboratory Autoclave</h2>
&nbsp;
Chamber Volume and Format
A 16&ndash;28 L benchtop autoclave handles a single researcher's daily glassware and media loads. A 50 L benchtop unit or a 80&ndash;150 L floor-standing model is appropriate for core facilities, BSL-3 labs, or any setting processing biohazardous waste in volume. Allow 25&ndash;30% headspace above the load for adequate steam circulation.
Cycle Type: Gravity vs. Pre-Vacuum
Gravity cycles are standard for liquids, unwrapped solid instruments, and glassware. Pre-vacuum cycles are required for wrapped instruments in peel pouches, porous loads (cloth, gauze, textiles), and hollow instruments with lumens where air must be removed for steam to penetrate. If your lab runs both load types, specify a unit with both cycle programs.
Temperature Programs
Standard units run 121&deg;C gravity and 134&deg;C prevac cycles. Labs processing a broad mix of materials benefit from models with additional preset programs: liquid sterilization with slow exhaust, prion deactivation cycles (134&deg;C extended hold), biohazardous waste cycles, and drying cycles for instruments.
Water Quality Requirement
Distilled or deionized water with a conductivity below 5 &micro;S/cm is required for steam generation in all laboratory autoclaves. Hard tap water causes mineral scale on heating elements, chamber walls, and sensors, reducing sterilization efficiency and cutting autoclave service life significantly.
Monitoring and Documentation
For GLP, GMP, or IACUC-regulated labs, specify a model with an integrated temperature/pressure data logger and printer output. This documents each cycle's sterilization conditions for audit purposes. Combine with biological indicator (spore) testing at minimum every 6 months&mdash;the only verification method that directly confirms microbial kill.
&nbsp;
<h2>Specifications Context</h2>
&nbsp;
The two standard steam sterilization conditions are 121&deg;C for a minimum hold of 15 minutes (gravity cycle) and 134&deg;C for a minimum hold of 3 minutes (prevac cycle). Actual load-specific validated times typically exceed these minimums. Biological indicator testing using&nbsp;Geobacillus stearothermophilus spore strips at 55&ndash;60&deg;C incubation is the only method that directly verifies sterilization efficacy at 121&ndash;135&deg;C. Chemical indicators (autoclave tape, integrators) provide visual confirmation that surface conditions were met but do not verify inner-load temperatures. Poor-quality feed water deposits scale on chamber walls and heating elements, reducing heat transfer efficiency, degrading sensors, and shortening autoclave lifespan&mdash;distilled or deionized water below 5 &micro;S/cm is required.
<a href="https://mbpinc.net/contact-us">Contact the expert team</a> at Molecular Biology Products Inc. now to find the right autoclave for your lab.

Autoclave

Chamber Specifications

BioClave™ Autoclaves

B4000-18 by Benchmark Scientific is the BioClave™ 18-liter benchtop research autoclave, operating at 121°C or 134°C (selectable) at 29 PSI with a built-in water tank and fully automatic single-button operation. The stainless-steel chamber (9.8 × 13.77 in) accommodates flasks, bottles, bags, and instruments; mechanical and electrical interlocks prevent door opening until pressure reaches 0 PSI.

BioClave™ 18 Research Autoclave, 18Ltr,115V

BioClave™ 18 Research Autoclave, 18Ltr, 230V

BioClave™ 28 Research Autoclave, 28Ltr, 120V

BioClave™ 28 Research Autoclave, 28Ltr, 208-240V

BioClave™ Mini Research Autoclave, 8Ltr, 115V

BioClave™ Mini Research Autoclave, 8Ltr, 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.
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<h2 dir="ltr">What you will find:</h2>
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<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>
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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;

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

BioMixer™ 3D Nutating Shaker, fixed speed

B3D1320 by Benchmark Scientific is a fixed-speed 3D nutating shaker running at 24 RPM on a 12 × 12 in autoclavable platform — built for foam-free mixing of blood tubes, western blot membranes, gels, and conical tubes. The included dimpled mat accommodates 1.5 mL microtubes through 50 mL conicals; an optional flat mat handles gel and blot trays. MBP is a registered vendor to Howard Hughes Medical Institute, Vanderbilt University, MD Anderson Cancer Center, Eurofins, and many other institutes across the USA.

Tilt Angle

Platform Size (1020/1320)

Load Capacity

Operating Temp. Range

B3D1020 Dims (in/cm)

B3D1320 Dims (in/cm)

Weight

BioMixer™ 3D Nutating Shaker, fixed speed, 12"x12" platform, dimpled mat, 115V

BioMixer™ 3D Nutating Shaker, fixed speed, 12"x12" platform, dimpled mat, 230V

Homogenizer Accessories

<h2>What are homogenizer accessories?</h2>
&nbsp;
Homogenizer accessories are the interchangeable tools, replacement parts, and supporting vessels and hardware that enable a laboratory homogenizer to be used across different sample volumes, sample types, and processing conditions beyond what the base instrument alone provides. For rotor-stator homogenizers, the critical accessories are the generator head and dispersing tool (the probe tip with rotating blade inside a stator tube), available in different sizes to match different sample volumes. For ultrasonic probe homogenizers, the primary accessories are the sonic probe tip or microtip, which is the consumable component that transmits ultrasonic energy and eventually wears or fatigues. Additional accessories include cleaning stations, jacketed vessels for temperature control, and support stands.
&nbsp;
<h2>What you will find:</h2>
&nbsp;
<ul>
<li>Rotor-stator homogenizer generator probes</li>
<li>Rotor-stator homogenizer probe tips and microtips</li>
<li>Bead kit and bead grinding media for bead mill homogenizers</li>
<li>Sample tube adapters and holders for homogenizers</li>
<li>Stands, clamp attachments, and supports</li>
<li>Cup horns and flow cells for ultrasonic homogenizers</li>
<li>Sound chamber enclosures for noisy ultrasonic homogenizers</li>
<li>Seals and other replaceable homogenizer parts </li>
</ul>
&nbsp;
<h2>How to choose homogenizer accessories</h2>
&nbsp;
Match the generator head size to your sample volume
Rotor-stator generator heads (dispersing elements) are designed for specific volume ranges: the S10N generator head suits 0.5&ndash;30 mL, S18N suits 5&ndash;150 mL, and S25N suits 50&ndash;500 mL volumes in common IKA Ultra-Turrax style instruments. Processing a 2 mL sample with a large S25N head gives poor energy density; processing 200 mL
Check ultrasonic probe tip diameter against the sample vessel and volume
Ultrasonic probe homogenizer tips are available in standard (12.7&ndash;19 mm) and micro (3&ndash;6 mm) diameters, with the micro-tip providing higher acoustic intensity for small volumes and the standard tip covering larger volumes. The tip diameter should be approximately 1/4 to 1/3 of the diameter of the sample container for effective cavitation throughout the sample.
Replace ultrasonic probe tips before pitting becomes severe
Ultrasonic probe tips erode at the vibrating face through cavitation, and a pitted tip delivers less energy, generates metal particles contaminating the sample, and risks mechanical failure. Inspect the tip face regularly for pitting and replace at the first signs of significant erosion to maintain energy delivery.
Use a water-jacketed vessel for temperature-sensitive samples
Water-jacketed homogenization vessels circulate cold water around the sample vessel during homogenization, limiting the temperature rise in the sample from frictional and ultrasonic heating. This is particularly important for enzyme preparations, RNA isolation, and other applications where sample heating above a few degrees above ambient can cause degradation.
Invest in a probe cleaning station for high-throughput work
Probe cleaning stations hold cleaning and rinse solutions in sequence for rapid cleaning between samples, reducing cleaning time and ensuring consistent decontamination in labs processing many samples per session compared with manual cleaning.
&nbsp;
<h2>Specifications context</h2>
&nbsp;
Ultrasonic probe tip replacement is a consumable cost, with tip lifespan typically 50&ndash;200 hours before pitting degrades performance. Manufacturers specify replacement tip models compatible with each horn assembly; non-specified tips risk poor energy coupling or damage. Titanium alloy probe tips remain the standard material for their combination of acoustic properties, corrosion resistance, and fatigue resistance under repeated ultrasonic cycling.
<a href="https://mbpinc.net/contact-us">Contact us to receive a quotation</a> on our homogenizer accessories from our expert staff at Molecular Biology Products Inc.

Blender Bag for BenchMasher 400 Laboratory Paddle Blender

IPD4400-B400 by Benchmark Scientific is a sterile 400 mL LDPE blender bag for the BenchMasher™ 400 Laboratory Paddle Blender (IPD4400). Each bag measures 30 × 18 cm with a 60 µm wall — the standard for food microbiology, environmental, and pharmaceutical sample homogenization. Supplied in 500-bag packs (10 × 50) for high-throughput lab workflows.

Blender Bag, 400ml x 60µm, 300 x 180mm, pack of 500 (10 pack fo 50)

Blender bag, 400ml x 70µm with lateral (side) nylon filter, 300 x 190mm, pack of 500 (10 pack of 50)

Blender bag, 400ml x 70µm with full nylon filter, 300 x 190mm, pack of 500 (10 pack of 50)

Shaking Incubator Accessories

<h2>What Are Shaking Incubator Accessories?</h2>
&nbsp;
Shaking incubator accessories are platform attachments and replacement components that secure culture vessels to the shaking deck, expand the range of vessel types a single incubator can accommodate, and maintain safe operation at high agitation speeds. The primary accessories are flask clamps (spring-type or magnetic-attachment systems) for Erlenmeyer flasks of specific volumes, tube racks for culture tubes and centrifuge tubes, microplate holders for 24-well, 96-well, and deep-well plate formats, universal platforms with non-slip surfaces for various container types, and adhesive mats for securing irregularly shaped vessels. Accessories are not universally interchangeable: platform slot patterns, clamp arm geometry, and attachment mechanisms vary by manufacturer and model, so confirm compatibility with the specific shaking incubator before ordering. Always match the flask clamp size to the exact flask volume in use; undersized clamps allow movement that damages cultures, and oversized clamps do not seat correctly in platform slots.
&nbsp;
<h2 dir="ltr">What You Will Find:</h2>
&nbsp;
<ul>
<li dir="ltr" role="presentation">MultiTherm Touch blocks offer specialized holders for cryotubes, PCR plates, and centrifuge tubes up to 5ml.</li>
<li dir="ltr" role="presentation">Microplate blocks provide secure, uniform agitation for standard and deep-well 96-well plates.</li>
<li dir="ltr" role="presentation">Universal spring platforms offer a flexible solution for holding various bottle and flask sizes on a single surface.</li>
<li dir="ltr" role="presentation">Precision tube adapters allow you to mix 0.2ml to 2.0ml tubes with perfect stability and heat transfer.</li>
<li dir="ltr" role="presentation">Stainless steel shelves help you maximize your incubator&rsquo;s internal capacity for static or upright samples.</li>
</ul>
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<h2>How to Choose Shaking Incubator Accessories</h2>
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Flask clamp size and type
Flask clamps are specified by flask volume: 50 mL, 125 mL, 250 mL, 500 mL, 1 L, and 2 L are the standard sizes. One-piece stainless steel clamp construction is preferable to spot-welded or riveted designs for durability at high agitation speeds. For flasks 2 L and above, clamps with a secondary girdle ring provide additional security during prolonged shaking at 200 rpm or above. Magnetic clamp systems (such as MAGic Clamp-style designs) allow tool-free, rapid exchange between flask sizes without loosening bolts.
Tube racks
Tube racks for shaking incubators accommodate standard 10 mL, 14 mL, 17 mL, 50 mL, and culture tube formats, slotted into the platform deck. Adjustable tube racks that fit multiple tube diameters offer more flexibility than fixed-diameter designs. Confirm the number of tube positions and whether the rack base fits the specific platform slot pattern of your incubator.
Microplate holders
Microplate holders secure 96-well, 24-well, deep-well (2 mL per well), and skirted PCR plate formats to the shaking platform. Platforms designed for microplates typically operate at smaller orbit sizes (19 mm) and higher speeds (up to 400 rpm) compared to flask platforms. Confirm that the holder is rated for the plate format and the speed required by your protocol.
Universal platforms and adhesive mats
Universal platforms with rubber-coated surfaces provide a non-slip base for tissue culture flasks (T-25, T-75), Petri dishes, staining trays, and containers that do not fit standard clamps. Adhesive mats function similarly and are useful for microcentrifuge tube arrays or multiple small containers. Replace adhesive mats periodically as tackiness degrades with repeated use and autoclaving.
Platform compatibility
Before purchasing accessories, identify the platform slot pattern (tab-and-slot vs. screw-mount vs. magnetic) specific to your shaking incubator model. Accessories from the same manufacturer as the incubator are the safest choice; third-party platforms may fit universal tab-and-slot patterns, but should be verified before high-speed use.
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<h2>Specifications Context</h2>
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Stainless steel flask clamps are the preferred material for autoclavability and chemical resistance. Verify whether accessories can be autoclaved at 121 degrees C; not all rubber or plastic components on tube racks and mats withstand repeated steam sterilization. The load capacity of the platform (in kg per position) limits the total mass of vessel plus culture volume that can be safely agitated; exceeding this limit at high speed stresses the drive bearings. For heavy-use labs running continuous 24-hour shaking protocols, select clamps with single-piece construction and check the drive belt or brushless motor specifications for continuous-duty cycle ratings.&nbsp;
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Ready to optimize your incubator&rsquo;s capacity? Browse our accessories collection and <a href="https://mbpinc.net/contact-us">reach out to the MBP team</a> for a friendly quote today.

Block , 24 x 2ml HPLC/ Autosampler Vials (12 x 32mm)

H5000-1232 by Benchmark Scientific is a 24-position MultiTherm interchangeable block for 2&nbsp;mL HPLC/autosampler vials (12&times;32&nbsp;mm). Precision-contoured wells enable uniform thermal transfer across all positions over the 0&ndash;100&deg;C range. A drop-in accessory for HPLC sample preparation, derivatization, and LC-MS digest workflows.

Block for 5ml centrifuge tubes

H5000-5MT by Benchmark Scientific is an exchangeable heating block for the MultiTherm series (H5000-H, H5000-HC), holding 15 × 5 mL conical centrifuge tubes at 0–100°C. Precision-contoured wells ensure uniform thermal transfer across all 15 positions. Designed for DNA extraction, enzymatic digestion, and cell lysis workflows requiring 5 mL tube format on the MultiTherm platform.

Block for one Deep Well Micro Plate

H5000-DWMP by Benchmark Scientific is a deep-well microplate block for the original MultiTherm™ Shaker H5000 series, holding one 96-well deep-well plate (max well height 54 mm) at 0–100°C and 200–750 rpm with precision-contoured wells. Sold separately from the H5000 instrument; not compatible with the MultiTherm Touch H5100 (which uses H5100-1DWMP or H5100-2DWMP).

Block for one Micro Plate

H5000-MP by Benchmark Scientific is a precision microplate thermal block for the MultiTherm™ H5000-series shaker, accommodating one standard 96-well SBS-footprint microplate with 0–100°C temperature control and precision-contoured wells for uniform heat distribution. Note: H5000-MP is for H5000-series instruments only — not compatible with the H5100-series MultiTherm Touch. Contact MBP at customerservice@mbpinc.net to confirm instrument compatibility before ordering.

Block, 12 x 15ml

H5000-150 by Benchmark Scientific is a 12 × 15 mL tube block for the original MultiTherm™ Shaker H5000 series, delivering 0–100°C temperature control and 200–750 rpm mixing with precision-contoured wells for uniform thermal transfer. The block is sold separately from the H5000 instrument and is not compatible with the MultiTherm Touch H5100.

Dry Baths Accessories

<h2>What Are Dry Bath Incubator Accessories?</h2>
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Dry bath accessories are the secondary components that extend or optimize the functionality of a dry block heater: aluminum insert blocks that define the tube format capacity; heated lids that eliminate condensation; external temperature reference probes for calibration verification; and carrying and storage cases for portability. Because the aluminum insert block physically determines which tube formats the dry bath can process, insert block selection is the single most impactful purchase decision after the base unit itself. Most manufacturers supply one insert format as standard with the base unit; labs processing multiple tube formats must purchase additional inserts separately. Select accessories based on the tube formats used in your primary protocols, confirming that inserts are brand- and model-compatible before ordering.
&nbsp;
<h2 dir="ltr">What You Will Find:</h2>
&nbsp;
<ul>
<li dir="ltr" aria-level="1">
Specialized Heating Blocks: High-conductivity aluminum blocks tailored for everything from 0.2ml PCR strips and 1.5ml centrifuge tubes to larger 50ml conical vessels.
</li>
<li dir="ltr" aria-level="1">
Custom &amp; Solid Block Options: Versatile solid blocks suitable for slides or custom machining, alongside blocks specifically drilled for HPLC vials and cuvettes.
</li>
<li dir="ltr" aria-level="1">
Precision Monitoring &amp; Power: External temperature probes for direct sample tracking and 12V vehicle adapters to maintain thermal control during mobile laboratory work.
</li>
</ul>
&nbsp;
<h2>How to Choose Dry Bath Accessories</h2>
&nbsp;
Aluminum insert blocks: format selection
Insert blocks are precision-machined from aluminum to accept specific tube formats with tight well tolerances (typically within plus or minus 0.1 mm of the tube's outer diameter). Common formats include: 24 wells for 0.5 mL tubes; 15-16 wells for 1.5 mL microcentrifuge tubes; 12-15 wells for 2 mL microcentrifuge tubes; 8-strip configuration for 0.2 mL PCR strip tubes; 12 wells for 15 mL conical tubes; 6 wells for 50 mL conical tubes; and a flat surface (no wells) for microplates or irregular vessels. Inserts are not universally interchangeable across brands; confirm the insert fits the specific dry bath model's block holder dimensions and, for models with auto-recognition, that the insert carries the required auto-recognition contact.
Insert material and thermal conductivity.
Aluminum (Al 6061 alloy) is the standard material for dry bath inserts due to its high thermal conductivity (approximately 167 W/m K), low density, and machinability for tight tolerances. Some specialty inserts for aggressive chemical applications use hard-anodized aluminum or stainless steel, with lower thermal conductivity but better chemical resistance. Always use manufacturer-supplied or manufacturer-approved aluminum inserts; after-market inserts with inferior tolerances reduce thermal contact and degrade temperature uniformity.
Heated lid accessories
Heated lid accessories for dry baths are sold separately for many base unit models or as an upgrade kit. When selecting a heated lid, confirm: (1) it fits the specific block footprint and height of your dry bath model; (2) the lid temperature range covers the required anti-condensation temperature (typically 60-110 degrees C); (3) the lid temperature is independently controlled from the block; and (4) the lid surface material is non-reactive with samples. For protein and enzyme protocols, a lid temperature 5-10 degrees C above the block temperature is the typical starting point.
External temperature reference probe
An external calibration probe (typically a thin RTD or thermocouple probe rated for direct insertion into a tube well, connected to a calibrated digital reference thermometer) verifies that the temperature inside the well matches the instrument's displayed setpoint. External probe verification is required for GLP-compliant and regulated laboratory protocols (ISO 9001, CLIA, cGxP) and is good practice annually for any research dry bath. Confirm that the probe diameter fits the insert well format (most probes are 2-5 mm diameter; well diameter varies by tube format) before ordering.
Carrying case for portable dry baths
Mini and portable dry bath models (Labnet PR1MA Mini, and similar) are available with dedicated carrying cases for field applications: point-of-care diagnostics, on-site environmental sampling, and field isothermal PCR or LAMP assays using a 12 V DC automotive power adapter. Carrying cases provide impact protection, secure block holder positioning, and cable management for field use.
&nbsp;
<h2>Specifications Context</h2>
&nbsp;
Aluminum insert block well tolerances of plus or minus 0.1 mm ensure full circumferential contact between the tube outer wall and the block well, maximizing heat transfer and minimizing temperature gradients between the sample and the block setpoint. A loose-fitting insert with 0.5 mm or more of air gap between tube and well reduces heat transfer and can introduce a temperature lag of 1-3 degrees C compared to the block setpoint, systematically underheating samples. Heated lid accessories eliminate condensation-related volume errors of 5-15% that can occur in short (&lt;10 microliter) enzyme reactions at 37-55 degrees C over 30-60 minute incubations. Auto-recognized interchangeable block inserts (where the dry bath unit automatically detects which format insert is installed) are a standard feature on Labnet and similar mid-range dry bath models, improving setup speed and reducing configuration errors.&nbsp;
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Enhance your dry bath setup today&mdash;check out our full range of blocks and <a href="https://mbpinc.net/contact-us">reach out to the MBP team</a> for a quote.

Block, 12 x 15ml centrifuge tubes

BSW15 by Benchmark Scientific is an aluminum dry bath block for 12 x 15 mL centrifuge tubes, with a block height of 3.25 inches. Compatible with Benchmark Scientific BSH5002 myBlock II and BSH1001 dry bath platforms. Delivers uniform dry heat across all 12 tube positions for incubation, thawing, and reagent preparation workflows.