Water Flow Sensor For S&A Water Chiller CW-3000 CW-5000 CW-5200Description Understanding how the water flow sensor works is essential to ensuring the smooth and efficient operation of your S&A Chiller 3000 5000 5200 Series. Luckily, the water flow sensor's operation is simple and easy to comprehend. The water flow sensor operates using the Hall effect principle, which involves the creation of a potential difference across an electrical conductor when a magnetic field is applied perpendicularly to the direction of