pH/ORP Controller Liquid and gas analysers. Description of Product Features: *Input from pH Electrode (Glass or Antimony), ORP Electrode and Pt100 2 or 3 wires *Automatic or manual *pH/ORP Measuring Range:0.00~14.00pH/-1000~1000mV *pH/ORP Resolution:0.01pH/1mV *Analog Output:0~20mA, 4~20mA *Digital Output:Serial Interface RS-232, RF