Mass Standards

Mass standards are certified reference weights used to calibrate and verify the accuracy of laboratory balances and scales. Each standard carries a known mass traceable to a national metrology institute, with a tolerance class defined by OIML or ASTM that states how far the true value may deviate from the nominal one. The Questpair catalogue lists 752 mass standards from 8 verified suppliers and distributors across 4 countries, in new, used and refurbished condition. Among the current listings, 22 percent are used. They range from single milligram weights to large cast calibration weights, so the price spread is wide.