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 HEX KEY SETS, RANGE (MM) 1.5
WERAHex Key Sets; Tool Type: Hex ; Handle Type: L-Key Long Arm ; Measurement Type: Metric ; Hex Size Range (mm): 1.5
Uline Stainless Steel Weight With Nist Traceable Certificate - Class 5, 1 Kg
Stainless Steel Weight With Nist Traceable Certificate-Class 5 1 Kg
Perkin Elmer US LLC Balance Tare Weight - TGA 7
This weight comes standard with the TGA 7 Sample Supplies Kit (N5190207).
Alkali Scientific Drug Testing Container, Polypropylene, Attached White Screw Cap, Tamper Seal, Patient ID Label & Temperature Strip, 95 kPa rated,, 60mL, 120/Case
Urine Drug Testing Containers from Alkali Scientific are designed to support secure, compliant specimen collection and transport in clinical and occupational health environments. Manufactured from durable polypropylene, each container features an attached white screw cap with an integrated tamper evident seal to help maintain specimen integrity and support chain of custody requirements. A built in temperature strip allows immediate specimen validation at the time of collection, while the included patient ID label supports accurate identification and documentation. Each container is 95 kPa rated to provide reliable, leak resistant performance during handling and transport, including air shipment. Suitable for use in DOT and non DOT testing programs, these containers support consistent specimen collection workflows.
TA Instruments TGA Weight Set Calibrated, Calibrated Weight Set, Discovery TGA, Balance Mechanism, Weight Calibration, TGA Weight Set Calibrated
Waters TA Instruments TGA Weight Set (Calibrated) is a calibrated weight set used for weight calibration of the Discovery TGA balance mechanism. It ensures accurate and reproducible instrument operation.