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
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.
Rice Lake Weighing System WEIGHT KIT 100G ASTM CLASS 4
Calibration Weight Kit, Rice Lake Weighing Systems, 100g, ASTM Class 4, SST Satin, Density 7.84, Electronic Balance Calibration Weights
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
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 gas supplier. The 16N084 model contains air at approximately 2000 psi fill pressure.
Teledyne ISCO, Inc M1 Class Single Piston Pump; Eccentric Drive; 0.0 - 40.0 Ml/Min. ; 500 Psi
M1 Class Single Piston Pump; Eccentric Drive; 0.0 - 40.0 mL/min. ; 500 psi; Stainless Steel Fluid Path; Automatic Piston Wash; without Pulse Dampener; Standard Seal (stainless steel energizer); Fitting package for 1/8"""" and 1/16"""" tubing
