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 Stainless Steel Weight With Nist Traceable Certificate - Class 5, 500 G
Stainless Steel Weight With Nist Traceable Certificate-Class 5 500 G
MSC Starrett Feeler Gage, 0.002 in Thick, 12 in Long, Parallel, Stainless Steel
This feeler gage is designed for precise measurements and features a thickness of 0.002 " It is 12 inches long and made from durable stainless steel, ensuring reliability and accuracy in various applications. The parallel leaf design provides consistent and accurate gap measurement.
- 0.002 in thickness
- Parallel leaf style for consistent measurements
- 12 in length for extended reach
- 0.5 in width
- Constructed from durable stainless steel
- Made in China
Grainger Calibration Gas 116L Ammonia Nitrogen
The Gasco Calibration Gas - Nitrogen is a high purity nitrogen gas used for calibration and testing. It comes in a 34L cylinder with CGA 580 inlet connection. The gas purity is 99.998% nitrogen. The cylinder operating pressure is 1800 psig at 70°F. This calibration gas meets standards for use in calibration and testing of gas detection and analysis equipment. The product is available through Grainger.
Med Vet International Silicone Tracheostomy Tube, 8.0mm Uncuffed, J0690K
8.0mm i.d. x 11.3mm o.d. Uncuffed Tube
Rice Lake Weighing System WEIGHT KIT 5KG ADJUSTED ASTM
Calibration Weight Kit, Rice Lake Weighing Systems, 5kg, Adjusted, ASTM Class 1, SST Polished, Density 7.84, Electronic Balance Calibration Weights