... /3hTemp. compensation range(0 ~ 100)°C(automatic)ORPMeasuring range (mV/ORP/EH)-1999mV ~ 0 ~ 1999mVResolution1mVAccuracyMeter:±0.1% FS, Overall: ±15mVOther Technical ... Product Features1. Special waterproof connector which four different electrodes (pH, ORP, Conductivity, DO) can be plugged into, ability of the meter ... polarization for only 3 to 5 minutes. Portable Digital PH/ORP Meter