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
Cayman Chemical E2 2Chlorostyryl3 5 6 10mg
A stilbene derivative with antioxidant and anticancer activities; stimulates proliferation of hydrogen peroxide-damaged ECV-304 cells (EC50 = 24.9 nM); reduces hydrogen peroxide-induced release of LDH in and increases viability of HUVECs; reverses hydrogen peroxide-induced release of MDA and decreases in SOD and GSH-Px activities and increases cNOS activity and NO production in HUVECs; induces cell death of A549 NSCLC cells in an IRE1α-dependent manner
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.
Azzota Corp Analytical Calibration Weights Sets, Astm Class E2, 0.001G-200G
Analytical Calibration Weights Sets, Astm Class E2, 0.001G-200G
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
Rice Lake Weighing System Weight, 2lb ASTM Class 7
Calibration Weight, Rice Lake Weighing Systems, Slotted, Interlocking, 2lb, 5Dia x 3/4 H x 9/16 Slot Width, ASTM Class 7, Cast Iron, Painted