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Products verified: June 8, 2026
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In precise scientific and industrial settings, the accuracy of measurements is paramount. Selecting the appropriate lab weights is crucial for ensuring the reliability and validity of your experiments, calibrations, and quality control processes. The right weights minimize measurement uncertainty, directly impacting the integrity of your data and the success of your work.
ACCURATE WEIGHT DETERMINATION: Features a ±2% accuracy tolerance for reliable measurements. Ideal for studying pressure, force, and torque in scientific settings or verifying balance scales.
CORROSION RESISTANT CONSTRUCTION: Manufactured from solid steel with a chromium-plated finish to prevent rust and oxidation. The smooth surface ensures long-term use in laboratory environments.
SECURE SLOTTED DESIGN: Each 100g mass includes a precision-cut slot to sit securely on the hanger. The wide base plate on the hanger prevents weights from slipping during force experiments.
MULTIPURPOSE EDUCATIONAL TOOL: Essential for physics classrooms and home schooling. Perfect for demonstrating mechanical principles, gravity, and balance laws through hands-on learning.
COMPLETE 1000G WEIGHT KIT: Package includes nine 100g slotted weights and one 100g hanger for a 1kg total mass. Precisely engineered components fit together seamlessly for immediate lab use.
Lab Slotted Mass Set: Includes 9 weights, one hanger weight and one storage case, each weighing 100g. Total weight of set is 1000g. ±2% Accuracy
Durable Material: Our slotted weight set with hanger crafted from high quality steel with chromium-plated finish, these laboratory slot weights resist corrosion and wear
Metric Weights: Designed for balance testing and weight determination, providing reliable performance in various laboratory and industrial scientific environments
Hanger Slot Design: Each metal slotted weight is equipped with a slot in the middle for fixing it onto the hanger, which prevents it from sliding during use and ensures stable and accurate calibration results.
Wide Applications: The slotted weight set ideal for used to study pressure, force, torque in the classroom or laboratory. Ideal for laboratory, teaching or home use
Sci-Supply is an American small business based in Southwest Ohio and has been proudly serving our customers since 2004. Get high quality products and exceptional customer care while supporting a small American business. We go the extra mile for YOU!
Includes 9 Individual Hook Weights Ranging from 10g to 1,000g in Size
Weights Included: One 10g Weight, Two 20g Weights, One 50g Weight, One 100g Weight, Two 200g Weights, One 500g Weight, and One 1,000g Weight
Lower Hook Receivers For Stacking Weights (See Alternate Photos)
WEIGH SCALES CALIBRATION: 7 PCS of calibration weights include 1g, 2g, 5g, 10g, 20g, 50g, 100g, a total of 188 grams. Various scales for precise measuring. Enough quantity for your use.
HIGH-QUALITY: Our Calibration Weights use steel chrome plating manufacturing process, the workmanship is fine. Super mirror polished, smooth and corrosion-resistant.
ACCURATE MEASUREMENT: These small weights are useful to test the accuracy of scales, keeping your scale calibrated. Making your experiment more effective.
WIDE RANGE OF USE: Our scale calibration weights suit for general laboratory, commercial, educational use. Such as digital pocket scale, jewelry carat scale, diamond scale, precision balance test.
WHAT YOU GET: 1g*1, 2g*1, 5g*1, 10g*1, 20g*1, 50g*1, 100g*1, our 7*24 friendly customer service for peace of mind.
1KG || 10 piece set includes 9x 100g weights and 1x 100g hanger
ACCURATE || ±2% accuracy
INCLUDES HANGER || Includes hanger for easy use and transportation
DURABLE & STURDY || Weights are made of high quality, powder coated, die cast zinc - Made to last
GREAT FOR ALL || A great alternative to expensive brass sets - Designed for use in professional laboratories, but is an ideal choice for science classrooms and household use
Last update on 2026-06-08 / Affiliate links / Images from Amazon Product Advertising API
How to Choose the Best Lab Weights
Accuracy Class and Tolerance
The most critical factor in selecting weights is their accuracy class, which dictates the permissible error and tolerance. Standards like OIML R111 (E0, E1, E2, F1, F2, M1, M2, M3) and ASTM (Classes 0-7) define these specifications. For high-precision analytical balances, E1 or E2 class weights are often required, while less sensitive applications might suffice with F1 or M1 classes. Always match the weight's accuracy to the balance being calibrated or tested and the precision needed for your application. Using weights with insufficient accuracy can lead to significant measurement errors and unreliable results.
Material and Construction
The material of the weights directly impacts their stability, durability, and resistance to environmental factors.
Stainless Steel: The most common and recommended material due to its excellent corrosion resistance, low magnetic susceptibility, and long-term stability. High-grade stainless steel ensures minimal wear and tear over time.
Construction: Look for weights that are seamlessly constructed or have a polished finish to prevent the accumulation of contaminants and facilitate easy cleaning. Weights with a well-sealed adjustment cavity are also preferred to maintain their integrity.
These aspects are crucial for maintaining the mass standard over time and in various laboratory environments.
Calibration and Certification
Regular calibration and proper certification are essential for ensuring the ongoing accuracy of your weights.
NIST Traceability: Ensure weights come with a certificate of calibration traceable to national standards like NIST (National Institute of Standards and Technology). This traceability provides confidence in the accuracy of the weights.
Recalibration: Establish a recalibration schedule based on your application's requirements and usage frequency. Professional recalibration services help maintain the integrity of your measurement system and comply with quality standards.
A robust calibration program extends the lifespan and reliability of your weight set.
Frequently Asked Questions
What are the different accuracy classes for lab weights?
Accuracy classes, like OIML R111 (E0, E1, E2, F1, F2, M1, M2, M3) or ASTM (Classes 0-7), define the tolerance and permissible error of a weight. Higher classes (e.g., E1, Class 0) offer greater precision, essential for highly sensitive measurements.
Why is material important for lab weights?
The material, typically stainless steel, affects a weight's stability, corrosion resistance, and magnetic properties. High-quality materials ensure long-term accuracy and minimize interaction with sensitive instruments.
How often should lab weights be calibrated?
Calibration frequency depends on usage, environmental conditions, and regulatory requirements. For critical applications, annual or semi-annual calibration is often recommended to maintain measurement integrity.
What's the difference between calibration weights and test weights?
Calibration weights are used to adjust or calibrate a balance to a known standard, ensuring its accuracy across its full range. Test weights are primarily used for routine checks and verification of a balance's performance between calibrations.
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