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
MSC 80/20 Inc. 45 deg T-Slotted Extrusion Support Bracket, Aluminum, Clear Anodized
This 45-degree T-Slotted Extrusion Support Bracket is constructed from aluminum and features a clear anodized finish. With an overall length of 6 inches (160 mm), it is designed for use with 2525 series extrusions and utilizes standard T-nuts for secure fastening.
- Designed for 45-degree T-Slotted extrusions
- Constructed from aluminum
- Clear anodized finish
- Overall length of 6 inches (160 mm)
- Compatible with 2525 series
- Utilizes standard T-nuts
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.
Perkin Elmer US LLC Balance Tare Weight - TGA 7
This weight comes standard with the TGA 7 Sample Supplies Kit (N5190207).
Rice Lake Weighing System WEIGHT KIT 5KG ASTM CLASS 4
Calibration Weight Kit, Rice Lake Weighing Systems, 5kg, ASTM Class 4, SST Satin, Density 7.84, Electronic Balance Calibration Weights
Rice Lake Weighing System WEIGHT 50MG LEAF ASTM CLASS1
Calibration Weight, Rice Lake Weighing Systems, Leaf, 50mg, ASTM, Class 1 SST Polished Density 7.95
Rice Lake Weighing System WEIGHT SCREW KNOB 50G ASTM
Calibration Weight, Rice Lake Weighing Systems, Screw Knob, 50g, ASTM, Class 1, SST, Polished Density 7.95
Rice Lake Weighing System WEIGHT SCREW KNOB 100G ASTM
Calibration Weight, Rice Lake Weighing Systems, Screw Knob, 100g, ASTM, Class 1, SST, Polished Density 7.95