The Polaris Watermatic C316 24-Volt Controller is designed to automatically monitor and maintain the sanitizer level and pH balance in swimming pools, spas and any circulating water system that requires water chemistry management. This controller is designed for easy installation and simple operation, and is used with tablet erosion feeders.

During the filtration cycle of the pool or spa, the sanitizer level and pH balance are maintained by a constant measurement of the ORP (Oxidation-Reduction-Potential) and pH balance of the water. Levels are displayed on the controller's ORP and pH light bar arrays. If the sanitizer level (ORP) falls below a predetermined set point, the controller activates the chemical feeder until the preset level is reached. The pH is maintained in a similar manner.