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
Rice Lake Weighing System Weight Set,100g-1g ASTM Class 1 SST Polished (5321) with NVLAP Accredited NIST Traceable Calibration Report
100 g Range, Calibration Weight Set, ASTM Class 1Stainless steel polished finishDesigned to meet ASTM E617-23 specificationsASTM Class 0 weight sets and individual weights are not individually marked with their weight value or individually serialized per ASTM E617-23Nominal value marked on weightsSerial numbers applied to case (weights may be marked with symbol)Density 7.95g/cm3
Grainger RICE LAKE WEIGHING SYSTEMS, Calibration Weight, 10 lb Nominal
The Rice Lake Weighing Systems 10 lb Calibration Weight is a high-precision weight used for calibrating and checking scales for accuracy. It features a stainless steel construction with a knob handle on top for easy handling. The weight has an accuracy tolerance of +/- 5 grams to ensure reliable calibration. With NIST traceable calibration certificate, this 10 lb weight is ideal for use in industrial, laboratory, and other precision weighing applications. The durable build makes it suitable for daily use.
Azzota Corp Analytical Calibration Weights Sets, Astm Class E2, 0.001G-200G
Analytical Calibration Weights Sets, Astm Class E2, 0.001G-200G
Rice Lake Weighing System WEIGHT 20MG LEAF ASTM CLASS1
Calibration Weight, Rice Lake Weighing Systems, Leaf, 20mg, ASTM, Class 1 SST Polished Density 7.95
Rice Lake Weighing System Weight,CYL 2kg ASTM Class 5 SST Satin Density 7.84
Calibration Weight, Rice Lake Weighing Systems, Cylindrical, 2kg, NIST, Class F, SST Satin, Density 7.84
Rice Lake Weighing System WEIGHT LEAF 200MG NIST CL F
Calibration Weight, Rice Lake Weighing Systems, Leaf Style, 200mg, NIST Class F, SST Satin, Density 7.95
Rice Lake Weighing System Weight Set,100g-1g ASTM Class 1
Calibration Weight Kit, Rice Lake Weighing Systems, 100g-1g ASTM Class 1, Stainless Steel, Polished finish (5-2-2-1 configuration)
Rice Lake Weighing System Weight Set,1lb-0.05oz ASTM Class 5
Calibration Weight Kit, Rice Lake Weighing Systems, 1lb-.05oz, ASTM Class 5, Stainless Steel, Satin finish, 2lb .05oz Kit
