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
Cole-Parmer Troemner 311-01S Economical S.S. Class 7 Weight Set; 100 g to 1 mg
This economical set is ideal for general-purpose applications. Weight sets are designed to achieve any total mass by combining smaller masses. All weighs feaature a satin finish surface and are marked with their nominal mass value.
Calibration Weight Kit, Rice Lake Weighing Systems, 500g-1mg, ASTM Class 1 SST Polished (5321)
Calibration Weight Kit, Rice Lake Weighing Systems, 5lb- 1/32 oz, NIST, Class F, SST Satin, 31lb Kit
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.
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 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 16N086 model contains 16 liters of gas at a pressure of 1800 psi.
Azzota Corp Analytical Calibration Weights Sets, Astm Class E2, 0.001G-200G
Analytical Calibration Weights Sets, Astm Class E2, 0.001G-200G
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.
Grainger Calibration Gas 116L Ammonia Air
The Portagreen Calibration Gas Air 30 is a calibration gas used to calibrate and bump test gas detectors. It contains 30% oxygen balance nitrogen and comes in a 34 liter cylinder with CGA 590 outlet connection. The gas has a 2 year recommended shelf life and is available in high pressure cylinder sizes of 34L, 58L, 103L, and 116L. This calibration gas meets ISO 6141 standards and is suitable for calibrating and bump testing many brands of portable gas detectors.
Rice Lake Weighing System Weight Set,4oz-1/32oz ASTM Class 5
Calibration Weight Kit, Rice Lake Weighing Systems, 4oz- 1/32 oz, ASTM Class 5, Stainless Steel, Satin finish, 8oz Kit