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
Teledyne ISCO, Inc Hk, M1, .250, Stainless Steel, 1A, Double
HK, M1, .250, STAINLESS STEEL, 1A, DOUBLE
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 supplier. The product dimensions are 4.5" diameter x 23.6" height and it weighs approximately 9 lbs when full.
Rice Lake Weighing System Weight, 50lb ASTM Class 6 Traceable
Calibration Weight, Rice Lake Weighing Systems, 50lb, Grip Handle, ASTM Class 5, Cast Iron, Painted with Traceable Certificate
Rice Lake Weighing System WEIGHT 5KG CAST INTRLOCK
Calibration Weight, Rice Lake Weighing Systems, Slotted, Interlocking 5kg, 6- 5/32 Dia x 1- 25/32 H x 3/4 Slot Width, ASTM Class 7, Cast Iron, Painted
Grainger Calibration Gas 116L Toluene Nitrogen
The Gasco Calibration Gas - Nitrogen is a high purity nitrogen gas used for calibration and purging. It has a purity of 99.998% and comes in a 116 liter cylinder with a CGA 580 outlet connection. The cylinder operating pressure is 2000 psig. This calibration gas meets National Institute of Standards and Technology standards and is ideal for calibrating gas analyzers and monitoring systems. The product number is 16N116.
Uline Stainless Steel Weight With Nist Traceable Certificate - Class 5, 2 Lb
Stainless Steel Weight With Nist Traceable Certificate-Class 5 2 Lb