Calibration and test weights are standardized masses certified by international, national, or industrial laboratories. Each weight has a precise mass that makes it suitable for calibrating balances to ensure subsequent weight measurements are accurate. Class designation indicates the uncertainty or adjustment tolerances for reference weights. Our calibration weights are classified according to OIML (International Organization of Legal Metrology). We propose class M1 calibration masses, which are also available with official ACCREDIA certificate.
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