Conductivity Meter Waterproof IP67 Automatic Temperature Compensation Yes Displayed Temperature Range 0 to 120 Operating Temp Range (F) 0 to 120 Display High Resolution Mono-chromatic Auto Power Off Yes Calibration 5 point Power Source AC or (4) AA Battery Includes (4) AA Batteries Star A222 Conductivity Meter Manufacturers Warranty Length 36 mo Testing Parameter Conductivity