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 LEAF 200MG NIST CL F
Calibration Weight, Rice Lake Weighing Systems, Leaf Style, 200mg, NIST Class F, SST Satin, Density 7.95
Teledyne ISCO, Inc M1 Class Single Piston Pump; Eccentric Drive; 0.00 - 10.00 Ml/Min.; 2,000 Psi
M1 Class Single Piston Pump; Eccentric Drive; 0.00 - 10.00 mL/min.; 2,000 psi; PEEK Fluid Path; Automatic Piston Wash; without Pulse Dampener; Standard Seal (Flouropolymer energizer); Fitting package for 1/8"""" and 1/16"""" tubing
Electron Microscopy Sciences Class 10 Sticky Swabs assorted
Dust-free sticky swabs are specially used and designed for a high degree dust-free environment (class10-100). Anti-static treatment can safely dissipate electrostatic charge. Sticky swabs are applicable for manufacturing and assembling static sensitive products.
TA Instruments 1 Gram Class E2 Precision Weight, Weight Calibration, TGA Instruments, 1 Gram Class E2 Precision Weight
Waters TA Instruments 1 gram Class E2 Precision Weight is used for weight calibration of TGA instruments. It allows users to maintain accurate weight measurements for reliable analytical results.
Grainger Calibration Gas 116L Ammonia 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. It has a working pressure of 1800 psi and comes with a CGA-590 outlet connection that is compatible with many gas detection instruments. The cylinder should be stored and used in accordance with local regulations. This calibration gas is useful for verifying calibration on gas detectors used for oxygen deficiency monitoring.
Grainger Calibration Gas 116L Hexane Air
The GASCO Calibration Gas - Air is a calibration gas cylinder containing 20.9% oxygen gas balanced with nitrogen. It comes in a 103 liter aluminum cylinder with a CGA 590 outlet connection. The cylinder operating pressure is 1800 psi. This calibration gas is used for checking, calibrating, and bump testing gas detection instruments to ensure they are functioning properly and accurately detecting oxygen levels. The cylinder is refillable and is built to DOT 3AA 2015 specifications. The product has a 12 month shelf life and is manufactured in the USA. This calibration gas is suitable for calibrating and bump testing a wide variety of gas detection and monitoring equipment.
Rice Lake Weighing System Weight, 1kg ASTM Class 5
Calibration Weight, Rice Lake Weighing Systems, Cylindrical, 1kg, ASTM Class 5, Stainless Steel, Satin finish, Density 7.84