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
Essendant PAPERSNGLE WGHT MTWE
100pct cotton hot press paper with a coating on both sides for extra versatility Features an ultra smooth finish on two sides that is optimized for Epson Photographic Dye Epson UltraChrome and Archival Inks Acid- lignin- and chlorine-free it is also pH buffered with calcium carbonate for a true archival sheet Engineered to give you the highest resolution and color saturation possible Sheet/Roll Size- 17x131 ft Paper/Media Thickness (mil)- 5 mil Paper/Media Color(s)- White Color Family- White
Sigma Aldrich Fine Chemicals Biosciences AccurisTM f1 Grade Calibra1EA
Precision compact and portable balances (readability 0.1 to 0.001g) can be calibrated with our Basic Class f1 Calibration Set. Included in the set are 23 stainless steel cylindrical and leaf weights 2 x 200g 1 x 100g 1 x 50g 2 x 20g 1 x 10g 1 x 5g 2 x 2g 1 x 1g 1 x 500mg 2 x 200mg 1 x 100mg 1 x 50mg 2 x 20mg 1 x 10mg 1 x 5mg 2 x 2mg 1 x 1mg. Cylindrical weights are marked with their nominal value. All are supplied in a protective case along with tweezers a cleaning cloth and dust brush.
Cayman Chemical ProstaglndIn E2 10mg
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Rice Lake Weighing System WEIGHT SCREW KNOB 5G ASTM
Calibration Weight, Rice Lake Weighing Systems, Screw Knob, 5g, ASTM, Class 1, SST, Polished Density 7.95
Rice Lake Weighing System WEIGHT KIT 100MG ASTM CLASS0
Calibration Weight Kit, Rice Lake Weighing Systems, 100mg, ASTM Class 0, Density 7.95