The Polaris Watermatic C660 ORP/pH Controller automatically monitors and maintains both the sanitizer level and pH balance in swimming pools, spas, or any circulating water system that requires water chemistry management. Easy to install and simple to operate, the C660 can be used with liquid feed pumps, granular feeders, tablet erosion feeders, and ozone generators. It is not warranted or recommended for use with chlorine gas systems.

During the filtration cycle of the pool or spa, the C660 constantly measures the sanitizer or ORP (Oxidation-Reduction-Potential) level and pH balance of the water. Measurements are displayed on the controller's ORP and pH digital readouts. If the ORP or pH falls below a pre-determined set point, the controller activates the chemical feeder until the preset point is reached. Built-in safety features prevent the feeders from activating if the sanitizer or pH balance is outside of the controller's range. The C660 has two standard power receptacles for the ORP and pH feeder hookups.