- They meet the highest quality standards according to DIN 12697 and BS 700 - 1583. - Individually calibrated through automatic calibration process carried out by robots. - Permanent quality control through all steps eliminate possible deviations from nominal values. - Calibrated to deliver (Ex) and the tolerances are according to DIN/ISO Class “AS” standards. - Conformity (“H”) certified, with a batch number printed on the body. - Batch certificate can be downloaded from our website. - Inscriptions and graduations are printed with special blue enamel.