Balance & Calibration Weights

Balance and standard calibration weights play a crucial role in ensuring the precision of measuring equipment. These weights help maintain accuracy in quantitative analysis and are used across a multitude of Scientific and industrial settings.

Hooked weights and weight and hanger systems are particularly useful for calibrating scales that require a secure attachment method, enhancing stability during calibration. NIST traceable weights are highly sought for their guaranteed accuracy and traceability to national standards, providing confidence in measurements and compliance with regulatory requirements.

These tools, more than just instruments, are the backbone of any setting that relies on precise weight measurements. They offer not just reliability and consistency but also a sense of indispensability.

Also available at Thomas Scientific – lab balance accessories, lab balance weights, and lab balances.

Balance & Calibration Weights

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  • Analytical Precision Class 1 Weights, with Traceable Certificates

    Class 1 Can be used as a reference standard in calibrating other weights and is appropriate for calibrating high-precision analytical balances with a readability as low as 0.1 mg to 0.01 mg. Cylindrical with handling knob Supplied in high quality polycarbonate case with red insert Manufactured in...

  • Thomas Scientific Calibrated Sale Weights

    labForce® (powered by Thomas Scientific)

    Thomas Scientific Calibration Weights are solid construction and made with non-magnetic stainless steel. OIML E2 can be used as a reference standard in calibrating other weights and is appropriate for calibrating high-precision analytical balances with a readability as low as 0.1 mg to 0.01 mg. OIML...

  • Professional CarePac®

    Performs routine testing of balances securely with only what you need - two test weights ASTM and OIML Weights available Saves time and money Includes tweezers, gloves and other accessories for professional weight handling Test balances with up to 4900 g weight capacity CarePac® offers a convenient...

  • Weight Set Hooked

    GSC International, Inc.

    There are nine hooked weights in this set. The weights are as follows: one 1000g cast-iron hooked weight, one 500g cast-iron hooked weight, two 200g brass hooked weights, one 100g brass hooked weight, one 50g brass hooked weight, two 20g brass hooked weights, and one 10g brass hooked weight. Comes...

  • Analytical Precision Class 4 Weights with Traceable Certificates

    Class 4 For calibration of semi-analytical balances and for student use. Traceable Certificate The Traceable Certificate is designed for those laboratories and companies that require traceability but do not need to meet any stringent regulatory requirements. The Traceable Weight Certificate...

  • Laboratory Weighing

    Mettler Toledo

    METTLER TOLEDO's world leading expertise in metrology extends to weights, weight sets and weight calibration services. The weight portfolio covers OIML weights from fifty micrograms to five tons in all accuracy classes. Our weights are used all over the world, not only for testing balances but also...

  • Weight Set Slotted with Hanger 12 pcs.

    This slotted weight set includes the following: Nine 20g brass slotted weights One 10g brass slotted weight Two 5g brass slotted weights One 50g hanger PRODUCT WARNINGS WARNING: This product can expose you to chemicals including lead, which are known to the State of California to cause cancer, birth...

  • Electronic Balance Class 4 Weights, with Traceable Certificates

    Class 4 For calibration of semi-analytical balances and for student use. Traceable Certificate The Traceable Certificate is designed for those laboratories and companies that require traceability but do not need to meet any stringent regulatory requirements. The Traceable Weight Certificate...

  • Analytical Precision UltraClass Cal-Paks, with NVLAP Accredited Certificates

    UltraClass The weight tolerance is equal to ANSI/ASTM E617 Class 0 and exceeds OIML R 111 Class E2. This class is used as a reference standard for calibrating other reference standards and weights and is appropriate for calibrating high-precision analytical balances with a readability as low as 0.01...

  • WEIGHT, 100MG, ASTM, 4, PCASE, CAL

    ASTM Weights. Single ASTM 4 class sheet weight in a plastic box including a calibration certificate Unique Design METTLER TOLEDO ASTM weights are designed to resist dust offering a long term stability. High Gloss Polish Experience, combined with special skill acquired through years of weight...

  • Slotted Masses with Hanger - Stainless Steel

    Weight set made from stainless steel Weights are slotted to fit and lock on to the hanger Hanging mass is perfect for balance testing and weight determination Good classroom tool for demonstrations on force and balance This Masses is perfect for labs and demos on force and balance, and can be used...

  • Weight Analyt Ultra Cls w / WCC 5Kg

    UltraClass The weight tolerance is equal to ANSI/ASTM E617 Class 0 and exceeds OIML R 111 Class E2. This class is used as a reference standard for calibrating other reference standards and weights and is appropriate for calibrating high-precision analytical balances with a readability as low as 0.01...

  • Analytical Precision Class 2 Weights with Traceable Certificates

    Class 2 Appropriate for calibrating high-precision top loading balances with a readability as low as 0.01 g to 0.001 g. Traceable Certificate The Traceable Certificate is designed for those laboratories and companies that require traceability but do not need to meet any stringent regulatory...

  • Iron Hooked Weight, 1000g, Retractable Hook

    Solid Iron Hooked Weight 1000 grams (2.2 pounds) Hook is free to move and hooks on both sides for additional weights to be connected Weight is painted black with yellow weight amount identifier Weight is cylindrical and has a diameter of 50mm (1.96" ) and is 67 mm tall (2.64") This weight has a...

  • Hooked Iron Weight with Bottom Slot, 200g

    Single hooked weight weighing 200g (0.44lbs) Cylindrical with cone shaped top Features hook for easy lifting and hanging. Bottom slot allows for other hooked weights to be attached in tandem Measures 1.25" in diameter, and is 2.75" in height Made of powder coated steel Single hooked weight. 200...

  • Wt Analyt Ultra Cls w / TC 200G

    The weight tolerance is equal to ANSI/ASTM E617 Class 0 and exceeds OIML R 111 Class E2. This class is used as a reference standard for calibrating other reference standards and weights and is appropriate for calibrating high-precision analytical balances with a readability as low as 0.01 mg.

  • Individual Calibration Weights

    Stainless steel polished finish Designed to meet ASTM E617-13 specifications ASTM Class 0 weight sets and individual weights are not individually marked with their weight value or individually serialized per ASTM E617-13 Nominal value marked on weights Serial numbers applied to case (weights may be...

  • Laboratory Weighing

    Mettler Toledo

    METTLER TOLEDO's world leading expertise in metrology extends to weights, weight sets and weight calibration services. The weight portfolio covers OIML weights from fifty micrograms to five tons in all accuracy classes. Our weights are used all over the world, not only for testing balances but also...

  • Weight Cert.300G

    The weight tolerance is equal to ANSI/ASTM E617 Class 0 and exceeds OIML R 111 Class E2. This class is used as a reference standard for calibrating other reference standards and weights and is appropriate for calibrating high-precision analytical balances with a readability as low as 0.01 mg.

  • Brass Weight Set Slotted

    GSC International, Inc.

    This slotted weight set includes the following: One 500g brass slotted weight Two 200g brass slotted weight One 100g brass slotted weights One 50g brass slotted weight Two 20g brass slotted weights One 10g brass slotted weight One 50g hanger One weight rack PRODUCT WARNINGS WARNING: This product can...

  • Weight 300G

    Troemner

    The weight tolerance is equal to ANSI/ASTM E617 Class 0 and exceeds OIML R 111 Class E2. This class is used as a reference standard for calibrating other reference standards and weights and is appropriate for calibrating high-precision analytical balances with a readability as low as 0.01 mg.

  • Analytical Precision Class 1 Weights, with NVLAP Accredited Certificate

    Class 1 Can be used as a reference standard in calibrating other weights and is appropriate for calibrating high-precision analytical balances with a readability as low as 0.1 mg to 0.01 mg. Cylindrical with handling knob Supplied in high quality polycarbonate case with red insert Manufactured in...

  • Analytical Precision UltraClass Weight Sets with Traceable Certificates

    UltraClass The weight tolerance is equal to ANSI/ASTM E617 Class 0 and exceeds OIML R 111 Class E2. This class is used as a reference standard for calibrating other reference standards and weights and is appropriate for calibrating high-precision analytical balances with a readability as low as 0.01...

  • Hooked Iron Weight with Bottom Slot, 500g

    Single hooked weight made of high quality iron 500 metric grams Total length of 4.25" with a 1.5" width. Features a slotted bottom with a bar for the ability to hook additional weights underneath Ideal as additional or spare part for hooked weight sets This single hooked weight is made of high...

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