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
Uline Cast Iron Weight With Nist Traceable Certificate - Class 6, 20 Kg
Cast Iron Weight With Nist Traceable Certificate-Class 6 20 Kg
Uline Stainless Steel Weight With Nist Traceable Certificate - Class 5, 1 Kg
Stainless Steel Weight With Nist Traceable Certificate-Class 5 1 Kg
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)
Grainger Calibration Gas 116L Pentane Air
The Grainger Portable Gas Detector Calibration Kit with 116L Cylinder is designed for calibrating and bump testing portable gas detectors. It includes a 116L aluminum cylinder filled with calibration gas, a regulator with flowmeter, and tubing. The kit provides a simple way to perform routine calibration and bump tests to ensure gas detectors are operating properly. With 116L of gas, it has enough capacity to calibrate multiple detectors while providing accurate concentrations. The regulator allows easy control of flow rate. This portable kit enables compliance with calibration procedures.
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 16 liter aluminum cylinder contains 99.9995% pure air 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 supplier. The 16N075 model contains 16 liters of gas at a pressure of 2000 psi.
Rice Lake Weighing System Weight, 200g ASTM Class 2
Calibration Weight, Rice Lake Weighing Systems, Cylindrical, .2lb, ASTM Class 2, Stainless Steel, Satin finish, Density 7.84