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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.
Industrial Durability: Constructed with rugged, high-quality chromed steel, the Aggstrom mass set is engineered for long-lasting durability and superior rust resistance in demanding laboratory environments.
Precision Accuracy: Calibrated to a professional ±2% accuracy standard, Aggstrom weights ensure reliable and consistent data for all your scientific measurements and delicate balance testing.
Optimized Design: Specifically engineered for balance testing and weight determination, Aggstrom’s slotted design allows for secure stacking and seamless integration with the included precision hanger.
Versatile Lab Application: The perfect science education tool for studying pressure, force, and torque. Aggstrom is ideal for classroom demonstrations, professional laboratories, or advanced home-schooling projects.
Complete 100g Set: This Aggstrom package includes a full 100g set featuring nine 10g slotted weights and one 10g hanger, providing a comprehensive solution for incremental testing.
DOUBLE HOOKED WEIGHT SET: 8-piece lab weight set, 200 g (0.44 lb) each; dual-end hooks let you connect, hang, and stack loads for force, tension, and motion demonstrations.
CONSISTENT HANDLING: Solid chrome metal body (approx. 30 x 35 mm) with smooth plated surface—easy to wipe clean and simple to grip, helping keep repeated trials organized in busy lab sessions.
PHYSICS LAB SCENARIOS: Built for pulley systems, tension tests, motion experiments, and general science laboratory work; adjust mass in clear steps by adding pieces instead of swapping bulky weights.
STACKABLE DUAL HOOK DESIGN: Hooks on both ends support quick linking to strings, springs, and hangers; connect multiple weights in series to reach your target load for demonstrations and bench setups.
STORAGE & SETUP TIPS: Includes 2 storage cases to keep weights separated; before each run, confirm hooks are fully seated and your stand/cord is rated for the combined load to reduce slips during testing.
17 PCS PRECISION WEIGHTS: This calibration weight set contains 17 pieces of different weights (includes 1x10mg, 2x20mg, 1x50mg, 1x100mg, 2x200mg, 1x500mg, 1x1g, 2x2g, 1x5g, 1x10g, 2x20g, 1x50g, 1x100g) and 1 piece for tweezers.
HIGH ACCURACY: The permissible error is -0.003 to +0.003g. The calibration weight kit can be used for digital pocket scale, jewelry carat scale, diamond scale, precision balance test.
HIGH QUALITY: These weights are made of solid feeling coated metal, with chrome-plated surface, which can resist corrosion. Ensure the quality of the weight will not be damaged and can be reused multiple times.
EASY TO USE: The scale calibration weight kit comes with a tweezers, makes it convenient to pick the weights. Metric calibration weight for calibrating the weights, or electronic balances and scales.
SUITABLE FOR MULTIPLE INDUSTRIES: The calibration weights for digital scale suitable for general laboratory, commercial, experimental, educational purpose and daily life use.
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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)
Last update on 2026-07-23 / 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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