HÄFNER Standard Weights: Classes E0, E1, E2

Mass Standards and Standard Weights

Since 1933, HÄFNER, a leader in modern weight manufacturing, has been producing high-quality mass reference standards and commercial weight sets in accordance with ISO 9001:2015. HÄFNER weights are renowned worldwide for their reliability and precision.

As a premiere NVLAP-accredited metrology laboratory, Masy BioServices understands the imapct that high-quality mass reference standards and laboratory weights can have on the quality of your processes and products. We use HÄFNER weights in our own mass calibration laboratory; knowing our customers value precision and excellence as much as we do, we have partnered with HÄFNER to make these industry-leading standard weights and commercial weights available in the United States.

Primary Standards: Class E0

  • As national standard and/or to show the national mass scale up to 50 kg.
  • For calibration (tracing) of the mass standards of class E1 to national standards. 

Mass Standards: Class E1

  • Adjustment, testing, official calibration and calibration instrument for the quality assurance of scales with more than 1,000,000 steps in accordance with DIN EN ISO 9001ff etc.
  • For the calibration and official calibration of weights of class E2 in accordance with OIML R111 and E08.
  • For high precision weighing or comparative measurements on measurement comparators.


Standard Weights: Class E2

  • Adjustment, testing, official calibration and calibration weights for precision scales of class I.
  • For the quality assurance of scales with fewer than 1,000,000 steps in accordance with DIN EN ISO 9001ff etc.
  • For weighing or making comparative measurements on class I scales or on measurement comparators.
  • For the calibration and official calibration of weights of classes F1 and F2 in accordance with OIML R111 and E08.

Contact us today with your HÄFNER standard weight needs.

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