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
Rice Lake Weighing System Weight, 1lb ASTM Class 5
Calibration Weight, Rice Lake Weighing Systems, Cylindrical, 1lb, ASTM Class 5, Stainless Steel, Satin finish, Density 7.84
Rice Lake Weighing System WEIGHT KIT 200G ASTM CLASS 4
Calibration Weight Kit, Rice Lake Weighing Systems, 200g, ASTM Class 4, SST Satin, Density 7.84, Electronic Balance Calibration Weights
Rice Lake Weighing System Weight Set,5kg-1g ASTM Class 5
Calibration Weight Kit, Rice Lake Weighing Systems, 5kg-1g, ASTM Class 5, Stainless Steel, Satin finish, 18.11kg Kit
Rice Lake Weighing System WEIGHT KIT 100G ASTM CLASS 4
Calibration Weight Kit, Rice Lake Weighing Systems, 100g, ASTM Class 4, SST Satin, Density 7.84, Electronic Balance Calibration Weights
Rice Lake Weighing System Weight, 50g ASTM Class 5
Calibration Weight, Rice Lake Weighing Systems, Cylindrical, 50g ASTM Class 5, Stainless Steel, Satin finish, Density 7.84
Rice Lake Weighing System WEIGHT SCREW KNOB 10G ASTM
Calibration Weight, Rice Lake Weighing Systems, Screw Knob, 10g, ASTM, Class 1, SST, Polished Density 7.95
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
MSC Starrett Feeler Gage, 0.004 in Thick, 0.5 in Wide, 12 in Long, Stainless Steel
This feeler gage is designed for precise measurements, featuring a specific thickness, width, and length. It is constructed from durable stainless steel with a parallel leaf style, suitable for various measurement applications.
- Thickness of 0.004 in
- Width of 0.5 in
- Length of 12 in
- Parallel leaf style
- Made of stainless steel
MSC Starrett Feeler Gage, 0.001 in Thick, 12 in Long, Stainless Steel
Starrett feeler gages are precision tools designed for accurately measuring small gaps and clearances. This feeler gage features a 0.001 in thickness, 0.5 in width, and 12 in length, constructed from durable stainless steel. It is suitable for a variety of industrial and mechanical applications requiring precise gap measurement.
- Accurate measurement of small gaps
- Thickness: 0.001 in
- Width: 0.5 in
- Length: 12 in
- Material: stainless steel
- Leaf style: parallel
MSC Mahr Master Ring, 0.375 in, Steel, Class XX, Certified
This master ring is designed for precise measurement and calibration applications. It features a 0.375 inch inside diameter and is constructed from durable steel, ensuring accuracy and longevity.
- 0.375 inch inside diameter
- Made from steel
- Class XX tolerance
- Includes certification
