Oakton pH/ORP controller features automatic buffer recognition, absolute and relative ORP measurements, and automatic temperature compensation to ensure measurement accuracy. Advanced features include two sets of programmable on/off relays are ideal for high/low control to activate an alarm, a pump, or another device and an isolated 4-20 mA output signal are suitable for opening valves and pacing pumps. ATC element is user selectable, 10K NTC or 1000 Ohm RTD. Order 56105-60 BNC-to-Stripped Wire Adapter for easy connections on terminal strip on back of controller.