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
Sigma Aldrich Fine Chemicals Biosciences AccurisTM E2 Grade Calibra1EA
Premium Class E2 Weight Set is ideal for calibration of analytical balances with a 0.0001g readability. Precision manufactured from high purity 316 stainless steel these weights are corrosion resistant with magnetic susceptibility 0.005. The set includes 6 weights 100mg to 100g for checking repeatability cornerload linearity and span. The weights are supplied in a protective case with tweezers a cleaning cloth and a certificate of verification.
Cayman Chemical Prostaglandin E2 QuantPAK
The PGE2 Quant-PAK has been designed for the convenient, precise quantification of PGE2 by GC- or LC-MS. It includes a 50 UG vial of PGE2-d4 and a precisely weighed vial of unlabeled PGE2, with the precise weight (5 mg) indicated on the vial. This unlabeled PGE2 can be used to quantify the PGE2-d4 standard by constructing a standard curve of peak intensity ratios (deuterated versus unlabeled).
Teledyne ISCO, Inc M1 Class Single Piston Pump; Eccentric Drive; 0.0 - 40.0 Ml/Min. ; 500 Psi
M1 Class Single Piston Pump; Eccentric Drive; 0.0 - 40.0 mL/min. ; 500 psi; Stainless Steel Fluid Path; Automatic Piston Wash; without Pulse Dampener; Standard Seal (stainless steel energizer); Fitting package for 1/8"""" and 1/16"""" tubing
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.
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