Brands

Laboratory Balances Accessories

Accuris™ Class E2, Calibration set for Analytical Balances, 6 pcs: 1x100mg, 1x10g, 2x20g, 1x50g, 1x100g

The W1101-6-100 by Accuris is a six-piece OIML Class E2 calibration weight set covering 100mg–100g (1×100mg, 1×10g, 2×20g, 1×50g, 1×100g), manufactured from 316 stainless steel (density 7.96 kg/dm³, magnetic susceptibility &lt;0.005) for calibrating 0.0001g analytical balances. Each set ships with a certificate of verification, protective case, tweezers, dust brush, and cleaning cloth—providing the reference masses and documentation required for external calibration and GLP/GMP balance qualification. Recommended for Accuris W3100-series analytical balances (W3100-120, W3100-210).

Manufacture

Compact Balance

<h2>What are compact lab balances?</h2>
&nbsp;
Compact lab balances are benchtop weighing instruments for routine laboratory tasks where gram-level readability is adequate: weighing buffer salts and media components, measuring bulk reagents, preparing agar or gel solutions, and other everyday weighing where milligram precision is not required. They typically provide readabilities of 0.01 g to 0.1 g with maximum capacities of 200 g to 5 kg, offering a larger pan and more robust construction than mini balances at a more accessible price point than precision analytical balances.&nbsp;
&nbsp;
<h2 data-start="464" data-end="489">What you will find:</h2>
&nbsp;
<ul data-start="490" data-end="979">
<li data-section-id="1ny8tp7" data-start="490" data-end="589">Accuris&trade; Compact Balance Series &ndash; Compact laboratory balances with precise weighing performance</li>
<li data-section-id="147r01a" data-start="590" data-end="667">Readability from 0.01g to 0.1g &ndash; Supports routine laboratory measurements</li>
<li data-section-id="yan4ka" data-start="668" data-end="737">LCD display balances &ndash; Clear and easy-to-read measurement display</li>
<li data-section-id="1j6bfix" data-start="738" data-end="817">RS232 output balances &ndash; Data transfer capability for printers and computers</li>
<li data-section-id="1a4n02a" data-start="818" data-end="902">Multi-mode weighing balances &ndash; Standard weighing, counting, and percentage modes</li>
<li data-section-id="ro930n" data-start="903" data-end="979">Compact benchtop balances &ndash; Space-saving design for laboratory workflows</li>
</ul>
&nbsp;
<h2>How to choose a compact balance</h2>
&nbsp;
Match the capacity to your most common and largest weighing tasks
Compact balances cover a wide capacity range, and selecting a model whose maximum capacity comfortably exceeds your typical largest task prevents accidental overloading. A mid-range capacity of 1&ndash;3 kg covers most routine lab reagent and media preparation needs.
Confirm readability is sufficient for your application
At 0.01 g readability, a compact balance reliably weighs quantities down to approximately 1&ndash;2 g with 1% uncertainty, suitable for general reagent preparation where milligram precision is not critical. For weighing quantities below 1 g or when milligram accuracy is needed, a mini balance or analytical balance is more appropriate.
Look for a large, removable, easily cleaned weighing pan
Routine lab weighing involves powder and liquid spillage, and a large stainless steel pan removable for cleaning separately reduces contamination risk. A larger pan accommodates a wider range of container sizes without the risk of uneven loading.
Check for USB or RS232 data output if you record weights digitally
Many compact balances include USB, RS232, or Bluetooth output that allows weight readings to be captured directly into electronic lab notebooks, spreadsheets, or LIMS, reducing transcription errors when multiple weights are recorded in sequence.
Consider GLP/GMP compliance features if required by your lab SOP
Laboratory balances in regulated environments may need to support date/time stamping of readings, balance identification output, and audit trail functionality. Compact balances vary in their support for GLP compliance features.
&nbsp;
<h2>Specifications context</h2>
&nbsp;
Compact balances use strain-gauge or electromagnetic force restoration (EMFR) load cells to convert applied force into an electrical signal, with EMFR providing higher linearity and readability at higher cost and strain-gauge providing adequate accuracy for routine applications at lower cost. As of 2026, compact balances with 0.01 g readability, internal calibration, and USB connectivity have become the standard specification for general-purpose molecular biology lab benchtops.
Don't hesitate to contact us and get a quote for your facility.&nbsp;<a href="https://mbpinc.net/equipments/laboratory-balances/compact-balance">Contact the friendly and helpful MBP team today!</a>

Compact Balances

Product Literature

User Manual

Accuris™ Compact Balance Series

Accuris W3300-120 Compact Balance by Accuris Instruments offers 120 g capacity and 0.01 g readability using gold-plated ceramic capacitor technology, with RS232 data output, a stainless-steel 11.5 cm pan, and an included draft shield. Suited for routine reagent and sample weighing in academic and research labs.

Accuris™ Compact Balance, 120 grams, readability 0.01grams, 115V

Accuris™ Compact Balance, 120 grams, readability 0.01grams, 230V

Accuris™ Compact Balance, 300 grams, readability 0.01grams, 115V

Accuris™ Compact Balance, 300 grams, readability 0.01grams, 230V

Accuris™ Compact Balance, 500 grams, readability 0.01grams, 115V

Accuris™ Compact Balance, 500 grams, readability 0.01grams, 230V

Accuris™ Compact Balance, 1200 grams, readability 0.1grams,115V

Accuris™ Compact Balance, 1200 grams, readability 0.1grams, 230V

Accuris™ Compact Balance, 5000 grams, readability 0.1grams, 115V

Accuris™ Compact Balance, 5000 grams, readability 0.1grams, 230V

Accuris™ Compact Balance, 10000 grams, readability 0.1grams, 115V

Accuris™ Compact Balance, 10000 grams, readability 0.1grams, 230V

UV Transilluminators

<h2>What Are UV Transilluminators?</h2>
&nbsp;
A UV transilluminator is a device with a UV-emitting lamp (fluorescent tube or LED) beneath a UV-transparent filter glass or acrylic surface that allows ultraviolet light to pass upward through a gel or membrane placed on top, exciting fluorescent dye molecules intercalated into nucleic acids and causing them to emit visible fluorescence. The visible fluorescence forms the bright bands on a dark background seen when a stained DNA gel is placed on a UV transilluminator. Three UV wavelengths are used: 254 nm for maximum DNA cross-linking and nick analysis; 302 nm (medium-wave UV) for EtBr and SYBR stains with high sensitivity but significant DNA damage at exposures above 30 seconds; and 365 nm (long-wave UV) for the lowest DNA damage during gel cutting and for viewing EtBr at reduced band contrast. Blue-light transilluminators at 465-470 nm replace UV entirely for compatible dyes, eliminating UV-induced DNA damage and hazardous UV exposure. Choose the transilluminator wavelength based on the dye used and whether the DNA will be recovered from the gel for downstream cloning or sequencing - 302 nm for EtBr visualization only; 365 nm or blue-LED for band cutting.
&nbsp;
<h2 dir="ltr">What You Will Find:</h2>
&nbsp;
<ul>
<li dir="ltr" aria-level="1">
<a href="mbpinc.net/equipments/electrophoresis-and-visualization/uv-transilluminators/uv-transilluminators-accessories">UV Transilluminator Accessories:</a>&nbsp;Essential protective gear and upgrade components designed to enhance your imaging workflow and user safety.
</li>
<li dir="ltr" aria-level="1">
<a href="mbpinc.net/equipments/electrophoresis-and-visualization/uv-transilluminators/reagents">Reagents: </a>Premium-grade stains and buffers formulated to provide high signal-to-noise ratios and optimized fluorescence for every run.
</li>
</ul>
&nbsp;
<h2>How to Choose a UV Transilluminator</h2>
&nbsp;
Wavelength selection
254 nm UV is optimal for photocrosslinking DNA to nylon membranes (UV crosslinkers, 120 mJ/cm2 standard crosslinking dose) and for maximum excitation of some dyes, but causes severe DNA strand breaks. 302 nm is the standard wavelength for EtBr gel visualization, providing bright bands in 10-30 seconds; DNA damage begins immediately at this wavelength, so exposure should be minimized to under 30 seconds for any DNA intended for cloning. 365 nm gives lower EtBr fluorescence intensity but dramatically reduces DNA strand breaks, making it preferred when gel band cutting and subsequent cloning efficiency are important. Blue LED at 465-470 nm is the safest option for any downstream application and is used with SYBR Safe, GelGreen, and SafeView stains.
UV lamp type: tube vs. LED
Traditional UV transilluminators use fluorescent UV tubes (8-25 W), which require 1-2 minutes of warm-up time, have a lifespan of 2,000-5,000 hours before replacement, and emit heat that can warm the gel surface during extended exposure. LED-based UV transilluminators offer instant-on capability (no warm-up), 50,000+ hour LED lifespan, lower energy consumption, and no UV tube replacement cost. As of 2025, LED UV and blue-LED transilluminators are standard in new lab installations; fluorescent tube models remain common in established labs.
Viewing surface dimensions
The UV-transparent surface determines the maximum gel size that can be viewed in one placement. Standard viewing surfaces are 20 x 20 cm (400 cm2) for standard agarose gels. Compact transilluminators with 10 x 10 cm surfaces (100 cm2) suit mini gel systems. Large-format transilluminators with 30 x 30 cm (900 cm2) surfaces can accommodate multiple gels or wide-format gels simultaneously. Confirm that the viewing surface area is larger than your largest gel tray to avoid needing to reposition the gel during band visualization.
UV safety features
UV transilluminators emit radiation that causes photokeratitis (eye damage) and skin burns within seconds of unprotected exposure. Safety requirements include: UV-blocking face shields or goggles (polycarbonate blocks UV below 380 nm); UV-opaque lab coat or arm sleeves; a darkroom enclosure or hood to contain UV radiation during imaging; and an auto-shutoff timer to limit exposure time. Gel doc systems with enclosed hoods automatically contain UV radiation and are inherently safer than open-top transilluminators used with handheld cameras.
Compatibility with SafeView DNA stains
SafeView stains (Safe-Green, Safe-Red, Safe-White) from MBP are compatible with UV transilluminators at 302-365 nm as well as blue-LED sources. Safe-Green (excitation 490 nm, emission 525 nm) is best with blue-LED at 470 nm. Safe-Red (excitation 540 nm, emission 630 nm) requires a green LED or white light source. UV transilluminators will visualize Safe-Green at reduced efficiency compared to blue-LED; for best results with SafeView stains, a dual UV + blue-LED system is recommended.
&nbsp;
<h2>Specifications Context</h2>
&nbsp;
UV transilluminator output intensity is specified in milliwatts per square centimeter (mW/cm2) at the viewing surface; 5-25 mW/cm2 at 302 nm is typical for research-grade instruments. Higher intensity enables shorter exposure times to minimize DNA damage. UV tube replacement is required every 2,000-5,000 hours of use for fluorescent-tube models; performance degrades progressively as the tube ages. Replacement tubes for standard 8 W or 15 W UV transilluminators are available through laboratory supply channels. Blue-light transilluminators at 470 nm have been shown in published studies to cause no measurable reduction in cloning efficiency even after 30-minute exposure, compared to a 30-second UV exposure that reduces transformation efficiency by 40-50% when using EtBr-stained DNA. Blue-LED transilluminators are the default specification for new labs purchasing gel visualization equipment, driven by safety compliance requirements in many institutions and the growing adoption of non-mutagenic dyes, including SafeView, SYBR Safe, and GelGreen.
&nbsp;
To discuss product availability or get selection guidance,&nbsp;<a href="https://mbpinc.net/contact-us">contact the MBP team</a>.

E3100

Accuris™ Compact UV Transilluminator

E3100 by Accuris Instruments is a compact 302&nbsp;nm UV transilluminator with four 6W UV bulbs, a 6.5&times;5.3-inch scratch-resistant viewing surface, and a UV-blocking cover. Supports ethidium bromide, SYBR Green, SmartGlow, and Gel Green stains. Weighs 0.9&nbsp;kg; includes 12VDC adapter for 115V supply. 2-year warranty.

Accuris™ Compact UV Transilluminator, 16.5x13.5cm, 115V

Accuris™ Compact UV Transilluminator, 16.5x13.5cm, 230V

W1000-Calibration Weight Tolerance Chart

Accuris™ F1 Grade Calibration Weights

W1000-100 by Accuris (Benchmark Scientific) is a 100 g F1 grade calibration weight made from non-magnetic stainless steel, compliant with OIML R111 tolerances for Class F1. Supplied in a protective screw-capped plastic case, it is suited for routine calibration of analytical and semi-micro laboratory balances. Order at mbpinc.net/quickorder using catalog number W1000-100 or contact customerservice@mbpinc.net.

Accuris™ F1 Grade Calibration Weight, 100g

Accuris™ F1 Grade Calibration Weight, 200g

Accuris™ F1 Grade Calibration Weight, 500g

Accuris™ F1 Grade Calibration Weight, 1000g

Accuris™ M1 Grade Calibration Weights

The W1005-1 by Accuris Instruments is a 1 g M1 grade calibration weight, OIML-compliant, supplied with an individual Certificate of Verification. Packaged in a protective screw-capped container. For routine balance verification in analytical, precision, and top-loading balances. Available from MBP Inc.

Accuris™ M1 Grade Calibration Weight, 1g

Accuris™ M1 Grade Calibration Weight, 2g

Accuris™ M1 Grade Calibration Weight, 5g

Accuris™ M1 Grade Calibration Weight, 10g

Accuris™ M1 Grade Calibration Weight, 20g

Accuris™ M1 Grade Calibration Weight, 50g

Accuris™ M1 Grade Calibration Weight, 100g

Accuris™ M1 Grade Calibration Weight, 200g

Accuris™ M1 Grade Calibration Weight, 500g

Accuris™ M1 Grade Calibration Weight, 1000g

Accuris™ M1 Grade Calibration Weight, 2000g

Microplate Reader

<h2>What Are Microplate Readers?</h2>
&nbsp;
A microplate reader (also called a plate reader or microplate photometer) is a laboratory instrument that optically measures the contents of each well in a microplate by passing light through or from the sample and recording the resulting signal. Detection modes available in microplate readers include absorbance (transmission of light through the sample at a defined wavelength), fluorescence intensity (excitation of a fluorescent molecule and measurement of emission), luminescence (detection of light emitted from a chemiluminescent or bioluminescent reaction), time-resolved fluorescence (TRF, using lanthanide chelates for low-background assays), and fluorescence polarization (FP, for homogeneous binding assays). The 96-well plate is the standard format in academic research, with typical assay volumes of 50 to 200 microliters per well; 384-well plates reduce reagent consumption and are standard in drug discovery.&nbsp;
&nbsp;
<h2 dir="ltr">What you will find:</h2>
&nbsp;
<ul>
<li>Absorbance Microplate Readers: Instruments for ELISA, enzyme assays, and routine colorimetric measurements.</li>
<li>UV-Vis Microplate Readers: Readers for nucleic acid, protein, and other UV-Vis absorbance assays.</li>
<li>Multi-Mode Microplate Readers: Systems combining absorbance, fluorescence, and luminescence detection for advanced assay workflows.</li>
<li>Automatic Injection Modules: Optional injectors for kinetic assays requiring reagent addition during measurement.</li>
<li><a href="https://mbpinc.net/equipments/microscopes-balances-and-analytical-equipment/microplate-instruments/microplate-reader/microplate-reader-accessories">Microplate reader accessories</a> including Filters, calibration plates, software, SmartDrop accessory plates, and other compatible accessories.</li>
</ul>
&nbsp;
<h2>How to Choose a Microplate Reader</h2>
&nbsp;
Single-mode absorbance vs. multi-mode reader
Single-mode absorbance readers cover colorimetric and UV-based assays across 340 to 850 nm and are lower cost, simpler to operate, and adequate for labs whose primary workflows are ELISA, protein assays, and OD-based quantification. Multi-mode readers add fluorescence intensity, luminescence, and optionally TRF and FP detection in one instrument. Choose a multi-mode reader when the lab regularly runs luciferase reporter assays, CellTiter-Glo or ATP viability assays (luminescence), Hoechst or SYBR Green fluorescent DNA quantification (fluorescence), or any assay that requires a detection mode beyond colorimetry.
Filter-based vs. monochromator systems
Filter-based readers use discrete bandpass filters for wavelength selection; one or a small set of filters defines the accessible wavelengths. They are less expensive, have faster reading speeds, and are sufficient when assay wavelengths are fixed and known in advance. Monochromator-based readers use a diffraction grating to continuously tune the excitation or emission wavelength across the full UV-Vis spectrum, providing complete spectral flexibility at a higher cost. Choose a filter-based reader for defined ELISA and standard colorimetric workflows; choose a monochromator system for novel assay development requiring custom wavelength selection.
Plate format and throughput
Most absorbance readers handle 6-well to 384-well SBS plates; high-throughput readers extend to 1536-well. Confirm that the plate carriage accepts both 96-well standard height and low-profile PCR plates if the instrument will be used for nucleic acid quantification. Reading speed matters in kinetic assays: confirm the reader's full-plate read time (seconds per plate at maximum sensitivity) and whether it supports top and bottom reading if cell-based fluorescence assays require bottom-read mode.
Incubation and shaking
For enzyme kinetics, cell viability assays, and microbial growth monitoring requiring temperature control, specify a reader with an integrated incubator (heating range ambient to 45 degrees C or 65 degrees C). On-board orbital or linear shaking is required for assays where sample mixing before or between reads improves signal quality (HTRF, homogeneous assays, turbid samples). Confirm whether the incubator and shaker function independently or require the reader to be stopped between reads.
Software and data management
Plate reader software ranges from simple endpoint reading with basic curve fitting (adequate for ELISA) to sophisticated kinetic analysis, data export to LIMS, 21 CFR Part 11 compliance, and custom protocol scripting. For high-throughput drug discovery or regulated pharmaceutical QC environments, confirm that the software meets the required data integrity and compliance standards before specifying the reader.
&nbsp;
<h2>Specifications Context</h2>
&nbsp;
Photometric accuracy for absorbance readers is specified as deviation from a certified absorbance reference standard at defined wavelengths; values of plus or minus 0.005 OD or better (at 1.000 OD) characterize research-grade readers. Well-to-well coefficient of variation (CV%) quantifies measurement consistency across a plate; below 1% CV at 1.0 OD is typical for quality absorbance readers. For fluorescence, sensitivity is expressed as signal-to-background ratio or limit of detection for a fluorescent standard (e.g., fluorescein at a defined concentration). For luminescence, background counts per well (counts per second on a dark, empty plate) determine sensitivity; lower background enables detection of dimmer luminescent signals from reporter assays with low expression or small cell numbers.&nbsp;
&nbsp;
To discuss product availability or get selection guidance,&nbsp;<a href="https://mbpinc.net/contact-us">contact the MBP team</a>.

Brochure

Accuris SmartReader 96, models MR9600 and MR9600-T

Accuris™ MR9600 Microplate Reader

The MR9600 by Accuris Instruments is a 96-well absorbance microplate reader with a 340–750 nm wavelength range, four included filters (405, 450, 492, 630 nm), and a &lt;6 second full-plate read time. A quartz-halogen light source and integrated touch-screen control make it a capable standalone ELISA, protein quantitation, and cytotoxicity reader. Optional PC software and incubation (MR9600-T) extend functionality for kinetic assays. Contact MBP for pricing and institutional orders.

Model

Control and Display

Light Source

Wavelength range

Half-Bandwidth of filters

Readout Range

Linearity (405nm)

Test Speed

Incubator (MR9600-T)

Shaking

User Interface

Storage

Ports

Dimensions

Weight

Warranty

SmartReader™ 96 Microplate Absorbance Reader, for 96 Well Plates, 115V

SmartReader™ 96 Microplate Absorbance Reader, for 96 Well Plates, 230V

SmartReader™ 96 Microplate Absorbance Reader, for 96 Well Plates, with Incubation, 115V

SmartReader™ 96 Microplate Absorbance Reader, for 96 Well Plates, with incubation, 230V

Digital Peristaltic Pumps

Accuris™ MR9610/MR9611 Accessories

Accuris™ MR9610 UV-Vis Microplate Reader

Accuris MR9610 SmartReader UV-Vis Microplate Reader by Accuris Instruments covers 200–1000 nm (±2 nm) with a xenon flash lamp and monochromator, reads 96- and 384-well flat-bottom plates in under 6 seconds, and operates via a 10-inch color touchscreen without an external PC. Includes onboard temperature control (ambient +5°C to 45°C) and optional SmartDrop accessory.

SmartReader™ UV-Vis Microplate Absorbance Reader, 115V

SmartReader™ UV-Vis Microplate Absorbance Reader, 230V

SmartReader™ UV-Vis Microplate Absorbance Reader with Cuvette Port, 115V

SmartReader™ UV-Vis Microplate Absorbance Reader with Cuvette Port, 230V

Accuris SmartReader™ Multimode

Automatic Injection Module for MR9620, set of 1

Automatic Injection Module for MR9620, set of 2

SmartDrop™ Accessory Plate for UV-Range Microplate Readers

SmartReader™ PC Software (Research Version)

SmartReader™ Multimode PC Security Software (FDA 21 CFR Part 11)

Optional Accessories for SmartReader™ Multimode Plate Reader

Accuris™ MR9620 SmartReader MultiMode Plate Reader

MR9620 by Accuris Instruments is a standalone multimode microplate reader covering absorbance (200–1000 nm), fluorescence intensity, and luminescence, with a built-in 10" touchscreen for PC-free operation. Full 96-well absorbance scans complete in under 15 seconds; 6- to 384-well plate formats supported; optional FDA 21 CFR Part 11 software available.

Measurement Technologies

Plate Formats

Incubation Range

Display

Communication Ports

Dimensions (WxDxH)

Power Input

Absorbance Wavelength Accuracy

Detector

Detection Limit

Range

Excitation Light Source

Measurement Speed

SmartReader™ MultiMode Plate Reader, 115V

SmartReader™ MultiMode Plate Reader, 230V

Mini Balances

<h2>What are mini lab balances?</h2>
&nbsp;
Mini lab balances are compact, lightweight weighing instruments designed to measure small masses with higher readability than general-purpose balances but in a smaller and more portable form factor than a full analytical balance. They typically offer readabilities of 0.001 g (1 mg) or better, capacities from 120 to 500 g, and small pan sizes suited to weighing out milligram quantities of reagents, standards, or small samples. Many mini balances include battery operation for field or portable use alongside AC adapter options for bench use.
&nbsp;
<h2>What you will see:</h2>
&nbsp;
<ul>
<li>Accuris&trade; Mini Balance - Portable mini balance used for routine daily weighing applications</li>
<li>GBT Semi-Micro Touchscreen Balance Series - Internal - Precision touchscreen mini balance featuring built-in calibration capability</li>
<li>Radwag 2.1/5.1g Capacity 1&micro;g Readability &oslash;0.6" MicroBalance - Sensitive microbalance with high precision and reliability</li>
</ul>
&nbsp;
<h2>How to choose a mini balance</h2>
&nbsp;
Match readability to your minimum weighing requirement
Balance readability determines the smallest mass difference the instrument can display, but the minimum net sample reliably weighable is typically 100&ndash;1000 times the readability, since below this threshold measurement uncertainty becomes significant. For weighing quantities in the range of tens to hundreds of milligrams, 0.001 g readability is generally sufficient; quantities below 10 mg benefit from 0.0001 g readability.
Check maximum capacity against your largest expected weighing task
Mini balances are optimized for small mass measurement and typically have maximum capacities of 120&ndash;500 g; exceeding the balance's capacity even momentarily can damage the load cell or shift the calibration. If you regularly weigh both small and larger quantities, a balance with higher maximum capacity or a second instrument for larger loads is more practical.
Confirm calibration method &mdash; internal vs external
Some mini balances support internal automatic calibration using a built-in calibration weight, while others require external calibration with a separate weight at set intervals. Internal calibration is more convenient and gives more consistent results across temperature fluctuations, which shift balance readings.
Evaluate whether battery operation is needed
If you need to weigh samples in a biosafety cabinet, fume hood, or field location without mains power, a mini balance with battery operation is necessary. For fixed bench use with reliable power, AC-only models are generally sufficient and may have better long-term stability.
Consider pan size relative to the containers you use
The pan size determines the footprint of vessel that can be placed on the balance; a pan too small for typical containers forces awkward positioning that risks uneven loading and reduced accuracy.
&nbsp;
<h2>Specifications context</h2>
&nbsp;
The minimum weight that can be reliably measured is determined by the USP minimum weight standard, which defines the minimum sample mass as the balance readability multiplied by a safety factor (typically 820 for pharmaceuticals), though in general laboratory use, a practical minimum of 100 times the readability is commonly applied to achieve 1% measurement uncertainty. As of 2026, mini balances with 0.001 g readability and internal calibration remain the most commonly purchased format for general reagent weighing at the benchtop or in a biosafety cabinet.
<a href="https://mbpinc.net/contact-us">Contact MBP today</a> to get more details about our mini balances products and other lab weighing products.

Accuris™ Mini Balance

W4000-500 by Accuris/Benchmark Scientific is a 500 g calibration weight for the Accuris W4000 Mini Balance, enabling routine external calibration and performance verification.

Accuris™ "Mini 500g" Balance, 500 grams/0.1g readability, battery operated

Accuris™ "Mini 100g" Balance, 100 grams/0.01g readability, battery operated

Precision Balance

<h2>What Are Precision Balances?</h2>
&nbsp;
A precision balance (also called a top-loading balance or semi-analytical balance at the finer end of the range) is an electronic weighing instrument that provides mass readability of 1 mg (0.001 g) to 0.1 g, with maximum capacities ranging from 120 g to 6 kg. They use either electromagnetic force restoration (EMFR) at the finer-readability end (1 mg to 0.1 mg) or strain-gauge load cells at the coarser end (0.01 g to 0.1 g), and most feature an open top-loading design without a full draft shield, distinguishing them from analytical balances. At 1 mg readability, some precision balance models include a partial windscreen (a three-sided partial enclosure) or removable draft shield panels; models at 0.01 g to 0.1 g readability typically operate in open-air conditions. Precision balances cover the widest range of routine laboratory weighing tasks: preparation of culture media batches in 2 to 5 L vessels (requiring 0.01 g accuracy), formulation of buffer concentrates, routine quality control check-weighing of capsules and tablets, dispensing of stock reagent aliquots, and any application where the protocol requires mass to two or three decimal places in grams without demanding the fourth decimal place (0.1 mg) of an analytical balance. A precision balance fills the gap between the 520 g capacity ceiling of a standard analytical balance and the coarse 0.1 g to 1 g readability of high-capacity bench scales; specify it when you need 1 mg to 10 mg resolution for samples up to 2 kg.
&nbsp;
<h2 dir="ltr">What you can find:</h2>
&nbsp;
<ul>
<li data-section-id="1vcyko4" data-start="25" data-end="110">Portable precision balances for routine laboratory and field weighing applications.</li>
<li data-section-id="1ry14v8" data-start="111" data-end="193">High-capacity precision balances for weighing larger samples and bulk materials.</li>
<li data-section-id="19ie366" data-start="194" data-end="295">Precision balances with internal or external calibration options for reliable measurement accuracy.</li>
<li data-section-id="10kqa2z" data-start="296" data-end="384">Touchscreen precision balances with advanced weighing functions and data connectivity.</li>
<li data-section-id="1uqcy5z" data-start="385" data-end="528" data-is-last-node="">Precision balance series from leading manufacturers, including Accuris and Radwag, for research, education, and quality control laboratories.</li>
</ul>
&nbsp;
<h2>How to Choose a Precision Balance</h2>
&nbsp;
Readability and capacity: matching both parameters
Precision balance selection requires matching both readability and capacity to the application. For weighing 0.5 to 5 g samples into vials for dissolution testing (where 1 mg accuracy is needed but a 520 g capacity is insufficient for the tare container), a 600 g x 0.01 g balance is the correct choice. For preparing 500 mL to 2 L media batches where 0.01 g accuracy is adequate, a 2 kg x 0.1 g balance covers the full range. For piece counting or check-weighing of bulk tablet batches, a 3 to 6 kg x 0.1 g precision balance handles the total weight of a tray or container of units.
Draft shield options
Precision balances at 1 mg (0.001 g) readability are affected by air currents and require either a full draft shield (as found on analytical balances) or, at a minimum, a three-sided windscreen to stabilize readings. Most 1 mg readability models in the 120 g to 620 g range include a removable glass draft shield. At 0.01 g readability, most models are used open-air on the bench, as air currents introduce errors of approximately 0.01 g, within the resolution tier of the instrument. Confirm the precision balance's recommended environmental conditions (maximum air velocity for stable readings) for the intended installation location.
Internal vs. external calibration
Precision balances with built-in internal calibration (a motorized weight that deploys automatically on temperature change or user command) maintain calibration between periodic external verification intervals without operator intervention. This is important in high-use labs where temperature fluctuates by 2 to 3 degrees C during the day. External calibration balances are lower cost and suitable when calibration is performed on a defined schedule (daily or weekly before use) using a certified reference weight. Most precision balance models at 0.01 g readability and above are available in both internal and external calibration configurations.
Advanced weighing functions
Research-grade precision balances include built-in weighing functions beyond standard mass measurement: piece counting (estimating the number of identical parts from a known sample weight); percentage deviation weighing (displaying the difference from a target mass as a percentage); formulation mode (guided dispensing of multiple ingredients to target masses with running total); and density determination (Archimedes method via an under-pan hook and optional kit). Confirm which functions are required and built in (not requiring a separate software purchase) for the intended application.
GLP features and connectivity
Precision balances for pharmaceutical QC, food testing, and accredited analytical labs require GLP documentation features: automatic printing of date, time, balance ID, operator ID, calibration status, and weighing result. RS-232 or USB output to a LIMS, balance printer, or PC is standard. For regulated environments, 21 CFR Part 11 software with an electronic audit trail and access control is available on premium models.
&nbsp;
<h2>Specifications Context</h2>
&nbsp;
Precision balance repeatability is specified as the standard deviation of 10 consecutive weighings of the same load at mid-range, typically 0.5 to 1 mg for models with 1 mg readability, and 0.01 to 0.05 g for models with 0.1 g readability. Environmental sensitivity is lower than for analytical balances: a 0.001 g precision balance in a vibration-affected environment may show repeatability of 1 to 5 mg in practice versus 0.5 mg in a stable environment. For the most demanding 1 mg-readability precision balance applications, place the balance on an anti-vibration mat and away from air vents. Pan size selection: precision balances at 1 mg to 0.01 g readability typically have pans of 130 to 200 mm; at 0.1 g readability, pans of 200 to 300 mm accommodate larger vessels.&nbsp;
&nbsp;
Require assistance in selecting the appropriate model? Contact the <a href="https://mbpinc.net/contact-us">MBP team</a> for a tailored quote and professional guidance.

Precision Balances

Accuris™ Precision Balance Series

W3200-120 by Accuris is a 120 g × 0.001 g precision balance with gold-plated ceramic capacitance sensors, glass draft shield, RS232 output, and external calibration. The 11.5 cm round pan, large backlit LCD, and counting/percent modes suit pharmaceutical QC, reagent prep, and teaching labs requiring milligram-level accuracy with documented calibration trails.

Accuris™ Precision Balance, 120 grams, readability 0.001grams, 115V

Accuris™ Precision Balance, 120 grams, readability 0.001grams, 230V

Accuris™ Precision Balance, 320 grams, readability 0.001grams, 115V

Accuris™ Precision Balance, 320 grams, readability 0.001grams, 230V

Accuris™ Precision Balance, 500 grams, readability 0.001grams, 115V

Accuris™ Precision Balance, 500 grams, readability 0.001grams, 230V

Accuris™ Precision Balance, 1200 grams, readability 0.01grams, 115V

Accuris™ Precision Balance, 1200 grams, readability 0.01grams, 230V

Accuris™ Precision Balance, 3200 grams, readability 0.01grams, 115V

Accuris™ Precision Balance, 3200 grams, readability 0.01grams, 230V

Accuris™ Precision Balance, 5000 grams, readability 0.01grams, 115V

Accuris™ Precision Balance, 5000 grams, readability 0.01grams, 230V

<h2>What Are Nano Spectrophotometers?</h2>
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A nano spectrophotometer (microvolume UV-Vis spectrophotometer) measures the absorbance of ultraviolet and visible light through a small volume (1 to 2 microliters) of sample held by surface tension between two optical-quality fiber pedestals or on a measurement arm surface, without a cuvette. The Beer-Lambert law relates absorbance to concentration: at 260 nm, 1 absorbance unit (AU) corresponds to 50 micrograms/mL of double-stranded DNA (dsDNA), 40 micrograms/mL of RNA, and 33 micrograms/mL of single-stranded DNA (ssDNA). At 280 nm, protein absorption from aromatic amino acids (tyrosine, tryptophan, phenylalanine) allows concentration estimation using the A280 method or extinction coefficients. Purity ratios A260/A280 and A260/A230 indicate contamination: A260/A280 of 1.8 (DNA) or 2.0 (RNA) indicates high purity; ratios below these values indicate protein or other UV-absorbing contaminant carryover. A260/A230 above 2.0 indicates the absence of carryover from EDTA, guanidinium, or carbohydrate contaminants common from silica-column purification kits. The full spectrum from 190 to 850 nm allows additional analysis: OD600 for bacterial culture density; custom wavelength measurements; and detection of heme, chlorophyll, and other chromophores. A nano spectrophotometer is the fastest way to verify DNA or RNA concentration and purity before PCR, sequencing, or cloning; it uses 1 to 2 microliters, takes 5 to 10 seconds per read, and requires no cuvette or dilution for concentrations above approximately 2 ng/microliter.
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<h2 dir="ltr">What you will find: </h2>
<ul>
<li>Nano spectrophotometers for rapid microvolume nucleic acid and protein quantification using pedestal and cuvette measurement modes.</li>
<li>Fluorometer systems for highly sensitive DNA, RNA, and protein quantification using fluorescence-based assays.</li>
<li><a href="https://mbpinc.net/equipments/microscopes-balances-and-analytical-equipment/nano-spectrophotometer/nano-spectrophotometer-accessories">Nano Spectrophotometer Accessories</a> for SmartDrop instruments, including replacement printer paper rolls, pedestal reconditioning solution, and standard-size cuvettes.</li>
</ul>
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<h2>How to Choose a Nano Spectrophotometer</h2>
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Single-sample vs. multi-sample throughput
Single-pedestal nano spectrophotometers (most models) measure one sample at a time, with read times of 5 to 10 seconds per sample. For labs measuring fewer than 20 samples per session, a single-sample model is adequate. High-throughput eight-pedestal models (such as the NanoDrop Eight) accept a row of 8 samples simultaneously from a 96-well plate strip, processing 96 samples in approximately 2 minutes, which is essential for next-generation sequencing library prep workflows, automated sample QC, and high-throughput screening.
Measurement range and sensitivity
The upper concentration limit of nano spectrophotometers is set by the path length: standard 1 mm path length accommodates dsDNA from 2 to 3,700 ng/microliter without dilution (NanoDrop-type instruments auto-select 0.2 mm or 1.0 mm path length based on absorbance). The lower detection limit is approximately 2 ng/microliter for dsDNA in UV mode; samples more dilute than this require fluorometric quantification (Qubit-type instruments with fluorescent dyes specific to DNA, RNA, or protein).
Contaminant detection algorithms
Basic nano spectrophotometers report A260, A280, A260/A280, A260/A230, and calculated concentration. Advanced models (NanoDrop Ultra type) include software algorithms (Acclaro-type intelligence) that use full-spectrum data to identify and correct for specific contaminants: dsDNA contamination in RNA samples; RNA contamination in dsDNA; guanidinium from RNA extraction kits; and EDTA carryover. Specify these advanced features for workflows where sample purity assessment matters for downstream application success (RT-qPCR, long-read sequencing, CRISPR libraries).
Touchscreen vs. PC-connected operation
Standalone touchscreen nano spectrophotometers allow operation without a connected PC, storing results internally or exporting via USB. PC-connected models require a laptop or PC with the instrument software installed for operation and data export, but provide more flexibility in data management, LIMS integration, and custom method programming. For shared lab equipment where multiple users access the instrument, touchscreen standalone models are operationally simpler.
Protein measurement modes
All nano spectrophotometers measure protein at A280 using a user-specified extinction coefficient. Advanced models add preprogrammed protein types (BSA, IgG, lysozyme, human serum albumin), A205 direct measurement for proteins with low or no A280 signal, and colorimetric assay support (BCA, Bradford, Lowry, Pierce 660 nm) for protein quantification using plate-reader-style microvolume cuvette adapters.
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<h2>Specifications Context</h2>
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Measurement accuracy at 260 nm is typically stated as plus or minus 1 to 2% coefficient of variation for repeat measurements of the same sample. Wavelength accuracy is specified as plus or minus 1 nm. Confirm the dynamic range covers the sample concentrations typically encountered in your workflow; highly concentrated DNA libraries from solid-phase extraction (above 500 ng/microliter) are accurately measured at 0.2 mm path; dilute RNA samples from small cell numbers or rare tissues may fall below the UV detection limit and require fluorometric quantification. Calibrate the blank (blanking solution) using the same buffer or elution solution as the sample; blanking with water when the sample is in TE buffer introduces a measurement error at A230 from EDTA absorption.
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To discuss product availability or get selection guidance,&nbsp;<a href="https://mbpinc.net/contact-us">contact the MBP team</a>.

Nano Spectrophotometer

User Manual - F1001

User Manual - F1008

Accuris™ Smart-Q Fluorometer Series

The Accuris™ Smart-Q™ 100 & Smart-Q™ 800 Fluorometers are designed for the precise quantification of DNA, RNA, and protein samples. By utilizing well-established methodologies for fluorescence detection, the Smart-Q Fluorometers provide higher specificity and enhanced accuracy compared to the traditional method of UV-absorbance detection.

Broad Range dsDNA Quantification Kit, 100 assays

Accuris™ Smart-Q™ 100 Fluorometer for single samples, 115V

Accuris™ Smart-Q™ 100 Fluorometer for single samples, 230V

Accuris™ Smart-Q™ 100 Fluorometer for Multiple samples, 115V

Accuris™ Smart-Q™ 100 Fluorometer for Multiple samples, 230V

High Sensitivity dsDNA Quantification Kit, 100 assays

0.5mL Fluorescence Detection Tubes, pack of 250

Smart-Q™ 800 Assay Tubes, pack of 1000

Smart-Q™ 800 Assay Tube Strips, pack of 120

SmartDrop Models

High Sensitivity DNA Quantification Kit, 100 assays

Broad Range DNA Quantification Kit, 100 assays

Additional Standard-Size Cuvettes, pack of 2

Extra paper roll for SmartDrop internal printer, Pk 3

SmartDrop Nano Spectrophotometer

Accuris™ SmartDrop Nano Spectrophotometers

The NS1000 by Accuris Instruments (SmartDrop L) is a microvolume UV-Vis spectrophotometer for DNA, RNA, and protein quantification using 1.0–2.0 µL samples at 260, 280, and 600 nm. Covers dsDNA from 10–2,500 ng/µL without dilution, with 0.005 A absorbance precision, 260/280 and 260/230 ratio calculations, 7-inch touchscreen, integrated thermal printer, and an OD600 cuvette port. Available in 115 V (NS1000) and 230 V (NS1000-E).