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 KIT 50G ADJUSTED ASTM
Calibration Weight Kit, Rice Lake Weighing Systems, 50g, Adjusted, ASTM Class 1, SST Polished, Density 7.84, Electronic Balance Calibration Weights
Rice Lake Weighing System WEIGHT SCREW KNOB 20G ASTM
Calibration Weight, Rice Lake Weighing Systems, Screw Knob, 20g, ASTM, Class 1, SST, Polished Density 7.95
Calibration Weight Kit, Rice Lake Weighing Systems, 500g-1mg, ASTM Class 1 SST Polished (5321)
Calibration Weight Kit, Rice Lake Weighing Systems, 5lb- 1/32 oz, NIST, Class F, SST Satin, 31lb Kit
Rice Lake Weighing System Weight Set,50g-1g ASTM Class 5
Calibration Weight Kit, 50g-1g, ASTM Class 5, Stainless Steel, Satin finish, (5-2-2-1 configuration), 110g Kit
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, 2kg ASTM Class 7
Calibration Weight, Rice Lake Weighing Systems, 2kg, Grip Handle, ASTM Class 7, Cast Iron Painted, Density 7.2
Rice Lake Weighing System Weight, 20kg ASTM Class 6
Calibration Weight, Rice Lake Weighing Systems, 20kg, Grip Handle, ASTM Class 6 Cast Iron, Painted
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 30MG LEAF ASTM CLASS1
Calibration Weight, Rice Lake Weighing Systems, Leaf, 30mg, ASTM, Class 1 SST Polished Density 7.95
Grainger Calibration Gas 116L Hexane Air
The GASCO Calibration Gas - Air is a calibration gas cylinder containing 20.9% oxygen gas balanced with nitrogen. It comes in a 103 liter aluminum cylinder with a CGA 590 outlet connection. The cylinder operating pressure is 1800 psi. This calibration gas is used for checking, calibrating, and bump testing gas detection instruments to ensure they are functioning properly and accurately detecting oxygen levels. The cylinder is refillable and is built to DOT 3AA 2015 specifications. The product has a 12 month shelf life and is manufactured in the USA. This calibration gas is suitable for calibrating and bump testing a wide variety of gas detection and monitoring equipment.
Sigma Aldrich Fine Chemicals Biosciences AccurisTM E2 Grade Calibra1EA
Premium Class E2 Weight Set is ideal for calibration of analytical balances with a 0.0001g readability. Precision manufactured from high purity 316 stainless steel these weights are corrosion resistant with magnetic susceptibility 0.005. The set includes 6 weights 100mg to 100g for checking repeatability cornerload linearity and span. The weights are supplied in a protective case with tweezers a cleaning cloth and a certificate of verification.
