Can be used in workshop conditions. Incorporates absolute measurement system. Conform to IP54 and with a function of first level water resistance and dust proof. Can be exposed to water, dust or oil. Power on/off. Mm/inch conversion. Zero-setting at any position. Data output(without cover B). 1) Measuring Range:0-150mm, Resolution mm/inch: 0.01/.0005″ Permissible Error:±0.03mm, L=236mm, a=40mm, b=21mm, c=16.5mm, d=16mm Remarks: With depth bar(flat or roundφ1.6) 2) Measuring Range:0-200mm Resolution mm/inch:0.01/.0005″ Permissible Error:±0.03mm l=286mm, a=50mm, b=24mm, c=19.5mm, d=16mm Remarks: With depth bar(flat or roundφ1.6) 3) Measuring Range:0-300mm Resolution mm/inch:0.01/.0005″ Permissible Error:±0.04mm l=400mm, a=60mm, b=25mm, c=20.5mm, d=17mm Remarks:With depth bar