The Aquasol pH electrode sensor is designed for compatible water-treatment and controller applications where pH monitoring is needed. A pH sensor is useful because it helps provide the controller with water-balance feedback, supporting more accurate chemical adjustment and dependable treatment performance.This replacement is especially useful when the original sensor is aging, damaged, inaccurate, or no longer reading correctly. Replacing the sensor can help restore more dependable water-monitoring performance and improve treatment control.The S020 is a practical service part when a compatible Aquasol system needs a pH sensor to restore dependable water-treatment monitoring. Aquasol pH electrode sensor Designed for compatible water-treatment applications Helps support pH monitoring and controller feedback Useful when the original sensor is inaccurate or worn Supports cleaner and more dependable water management