1The real-time measurement method is adopted, that is, the dual measurement displays the PH value from 0.00 to 14.00 and the ORP value from 1999 to 1999 mV. 2Easy to use, you can change the measurement value you want to observe without pressing any buttons. 3The 2in1 PH and ORP controller can measure and display the PH value and oxidationreduction value (ORP), equipped with BNC socket electrodes and two output power sockets. 4Powered by AC power, it is very suitable for longterm water quality monitoring and control. 5The PH controller is made of highquality ABS material, which is durable and not easily damaged. Item Type: PH ORP Controller Material: ABSModel: PH-803WFunction: measure ORP value/PH value of water quality Measuring Range: ORP: -1999~1999mV; PH: 0.00~14.00PHAccuracy: ORP: 5mV; PH: 0.05PHResolution: ORP: 1mV; PH: 0.01PHSetting Control Range: ORP: -1999~1999mV; PH: 0.00~19.99PHOperating Environment Temperature: 0-50, humidity