The Global Water’s pH/ORP Controller is a 1/8 DIN panel mount controller with dual SPDT Hi/Lo relays, manual set points and calibration potentiometers set into the front of the panel. The pH/OPR controller features a voltage/recorder output and an internal pH/ORP select switch. The display is a large 0.56” high efficiency bright red LED. Sensor connectors are a BNC input and spade lug screw type connector block. The pH/ORP Controller requires a Pt-100 ATC probe or a simulation resistor for temperature. The pH/ORP controller uses an all solid design to achieve low power consumption and reduced internal heating. Each controller is heat cycled 100 hours before shipment. The controller offers automatic pH temperature compensation from 0 to 100oC and set points that cover the entire sensor span.