Calibration Weights
Accurate and stable reference standards for calibrating weighing equipment, including variously certified/accredited weights and weight sets from different classes. Products may be constructed of aluminum, stainless steel, brass, iron, and other alloys.
Calibration weights (also known as reference weights or test weights) are manufactured to meet high tolerances and accuracy. They are used to spot-check the performance and verify the calibration of analytical balances, precision balances, and general-purpose scales in research laboratories, educational settings, and other working environments. Some calibration weights may also be used as reference weights for the calibration of improvised or non-certified weights.
How Are Calibration Weights Made?
Calibration weights may be take the form of simple discs, cylinders, wires, or leaves. Sold separately or as sets, they may also be supplied with tweezers, gloves, and a protective case. Calibration weights are often supplied as accessories for specific balance brands and models.
Calibration weights are made from polished brass, aluminum, special stainless steels, or other metals for durability, anti-magnetization, and resistance to corrosion or wear that may affect their accuracy.
Available in nominal values from a few milligrams to 10 kg or more, they may be supplied with certificates or statements of accuracy, compliance, and traceability.
How Are Calibration Weights Classified?
Calibration weights are classified based on accuracy by organizations such as ASTM, OIML, and NIST. The appropriate classification depends on the resolution of the balance and the degree of accuracy needed to satisfy a particular weighing application.
Principal Classes of Calibration Weights:
• Class M1: For standard scales
• Class F1: For precision electronic balances
• Class E2: For highly accurate analytical balances
Cayman Chemical ProstaglndIn E2 10mg
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Grainger Calibration Gas 116L Ammonia Air
The Gasco 226 CXG-16N135 is a 16-inch diameter, 135,000 BTU gas convection oven. It features a stainless steel exterior, porcelain enamel interior, and a three-tier rack system. This gas convection oven has a temperature range of 150-500°F, can fit up to six full-size sheet pans, and has a 60 minute mechanical cook timer. The CXG series ovens are ETL certified for safety and sanitation. This durable commercial oven is ideal for high-volume baking in restaurants, cafeterias, and bakeries.
Sigma Aldrich Fine Chemicals Biosciences AccurisTM f1 Grade Calibra1EA
Precision compact and portable balances (readability 0.1 to 0.001g) can be calibrated with our Basic Class f1 Calibration Set. Included in the set are 23 stainless steel cylindrical and leaf weights 2 x 200g 1 x 100g 1 x 50g 2 x 20g 1 x 10g 1 x 5g 2 x 2g 1 x 1g 1 x 500mg 2 x 200mg 1 x 100mg 1 x 50mg 2 x 20mg 1 x 10mg 1 x 5mg 2 x 2mg 1 x 1mg. Cylindrical weights are marked with their nominal value. All are supplied in a protective case along with tweezers a cleaning cloth and dust brush.
Electron Microscopy Sciences EMS F1 Grade Calibration Weight for Lab Balance, 500g
For use with EMS Mini Lab Balance.
Electron Microscopy Sciences EMS F1 Grade Calibration Weight for Lab Balance, 100g
For use with EMS Mini Lab Balance.
Azzota Corp Analytical Calibration Weights Sets, Astm Class E2, 0.001G-500G
Analytical Calibration Weights Sets, Astm Class E2, 0.001G-500G
Grainger Calibration Gas 116L Carbon Monoxide Air
The GASCO Calibration Gas - Air is a calibration gas cylinder containing air for calibrating gas detection instruments. This 34 liter aluminum cylinder contains 99.9995% pure air balanced with nitrogen and is certified to NIST traceable standards. The cylinder has a CGA-590 outlet with a brass valve and is refillable. This calibration gas is suitable for calibrating and bump testing gas detectors used for monitoring oxygen levels. With a 2 year shelf life, this cylinder from GASCO provides high purity air from a reliable supplier. The product dimensions are 4.5" diameter x 23.6" height and it weighs approximately 9 lbs when full.
Grainger Calibration Gas 116L Ammonia Nitrogen
The Gasco Calibration Gas - Nitrogen is a high purity nitrogen gas used for calibration and purging. It has a purity of 99.998% and comes in a 116 liter cylinder with a CGA 580 outlet connection. The cylinder operating pressure is 2000 psig. This calibration gas meets National Institute of Standards and Technology standards and is ideal for calibrating gas analyzers and monitoring systems. The product number is 16N137.
Grainger Calibration Gas 116L Carbon Dioxide Air
The GASCO Calibration Gas - Air is a calibration gas cylinder containing air for calibrating gas detection instruments. This 34 liter aluminum cylinder contains 99.9995% pure air balanced with nitrogen and is certified to NIST traceable standards. The cylinder has a CGA-590 outlet with a brass valve and is refillable. This calibration gas is suitable for calibrating and bump testing gas detectors used for monitoring oxygen levels. With a 2 year shelf life, this cylinder from GASCO provides high purity calibration air for maintaining accuracy of gas detection equipment.