Range PH:0.0014.00 mV:0±1999mV :0100Resolution PH:0.01PH   mV:1mV :0.1Accuracy PH:±0.01PH  mV:±1mV :±0.4Calibration 1point or 2point A T C 095Power DC9V/100mA  or  Rechargeable batteryOperating Conditions Temperature: 560   Humidity: 95% maximumDimensions 136×110×34mmWeight 228g

water testing monitor