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Individual Weights & Weight Sets

• ANSI/ASTM Class 1 calibration weights provide high precision. Can be used as reference standards in calibrating other weights and are appropriate for calibration of high-precision analytical balances.
• All calibration weights meet or exceed ASTM specifications
• All mass measurements are made using procedures developed by NIST
• All mass standards are milled from the finest bar steel stock ensuring consistent density
• Each weight is calibrated in a climate-controlled environment
• One-piece construction provides the maximum mass stability
• Each weight and weight set is supplied complete with a Certificate of Traceability at no additional cost. This report identifies the tolerance class, type of construction and lists the NIST test number and date for the primary standard(s), the secondary set number and the technician’s signature.
• An optional Certificate of Calibration is available and includes the nominal value and the conventional mass correction value for each weight certified. It will also list information on the standards the weights were compared against including: identifying number, NIST test number and date the standards were last calibrated. It also contains our NVLAP laboratory code, your name and address along with your PO number at the time of order.