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 G0364 Slotted Toolboard Hook Kit 1 in
The Grainger 14K279 is a Westward brand 1/4-inch drive socket set. This 108-piece socket set includes both SAE and metric sockets ranging from 1/4 inch drive to 3/4 inch drive in shallow, deep, and universal depths. The set is made from chrome vanadium steel and comes packed in a sturdy plastic blow mold case for storage and portability. This socket set is ideal for automotive and machinery repair and maintenance.
Cayman Chemical ProstaglndIn E2 methyl STR
A potential prodrug analog of PGE2 with enhanced lipid solubility
Grainger Calibration Gas 116L Hexane Air
The Gasco Calibration Gas Nitrogen is a high purity nitrogen gas used for calibration and testing of gas detection equipment. It comes in a 34L aluminum cylinder with CGA 580 outlet connection. The gas purity is 99.998% nitrogen. The cylinder operating pressure is 1800 psig at 70°F. This calibration gas meets NIST traceability standards and is ISO/IEC 17025 accredited. The 34L cylinder contains approximately 3400 liters of gas at atmospheric pressure. This is an ideal nitrogen gas source for span gas calibration of gas analyzers and detectors.
Grainger Calibration Gas 116L Carbon Monoxide Air
The GASCO Calibration Gas - Air is a calibration gas used to calibrate gas detection instruments. It contains 20.9% oxygen with the balance being nitrogen. The gas comes in a 34 liter cylinder with a CGA-580 outlet connection. The cylinder operating pressure is 1800 psi. This calibration gas meets NIST traceability standards and has a shelf life of 36 months. It can be used to calibrate and bump test gas detectors used for monitoring oxygen levels. This is a high purity gas mixture suitable for calibrating and testing air quality monitoring equipment.
