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
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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.
Grainger Calibration Gas 116L Pentane Air
The GASCO Calibration Gas - Air is a calibration gas cylinder containing zero air. It has a capacity of 103L and is made of aluminum. This cylinder of zero air can be used for calibration and bump testing of gas detectors and monitoring systems. The cylinder has a CGA 590 outlet connection and comes equipped with a brass 3-way valve. The gas mixture is 21% oxygen and 79% nitrogen. This calibration gas cylinder allows for accurate sensor testing and calibration. The cylinder is refillable and meets ISO standards. It is suitable for calibrating and bump testing a variety of gas detection equipment.
Rice Lake Weighing System WEIGHT KIT 1G ASTM CLASS 0
Calibration Weight Kit, Rice Lake Weighing Systems, 1g, ASTM Class 0, Density 7.95
Rice Lake Weighing System WEIGHT 50G OIML CLASS F2
Calibration Weight Kit, Rice Lake Weighing Systems, 50g, OIML Class F2
