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 10MG LEAF ASTM CLASS1
Calibration Weight, Rice Lake Weighing Systems, Leaf, 10mg, ASTM, Class 1 SST Polished Density 7.95
Sigma Aldrich Fine Chemicals Biosciences Economical neoprene dry-bo
Neoprene bonded sleeve and glove.General purpose elastomer. Resists moderate chemicals and acids ozone oils fats greases many oils and solvents. Attacked by strong oxidizing acids esters ketones chlorinated aromatic and nitro hydrocarbons.
Perkin Elmer US LLC Calibration Weight - Qty. 1
We offer a complete portfolio of consumables, accessories and supplies that deliver optimal performance in measuring the coefficient of thermal expansion (CTE), Tg, and TM in materials. Choose from a range of consumables and accessories with a cost efficient range of probes including expansion, compression, flexure, extension, and volumetric (dilatometry).
Grainger Screw Knob Black
The Justrite Screw Knob is a black plastic knob designed for use with Justrite safety cans. It has a 1-3/4" diameter knurled grip and a 1/4"-20 threaded stud. The knob can be used as a replacement part on many Justrite safety cans, including the 2 gallon and 5 gallon rectangular safety cans. It provides a comfortable grip and secure closure for the safety can pour spout. The black color matches most Justrite safety cans. This is an OEM replacement part made by Justrite.
Azzota Corp Analytical Calibration Weights Sets, Astm Class F1, 0.001G-200G
Analytical Calibration Weights Sets, Astm Class F1, 0.001G-200G