Atex Approved Insulation resistance: ≥20MΩ Pressure Scope: 4.5VDC~5.5VDC. Current: ≤25 mA Surface Temperature: ≤135º C Max Amplitude Resolution: ≥400 r/min error: 0.01% Hydraulic Strength: ≥1.0MPa Life: ≥20, 000, 000L Condition Temperature: -40º C~50º C Relative Humidity: 30%~85%