Seamless Compatibility: Precision-engineered to match for Intellichlor models IC15, IC20, IC40, and IC60, this flow switch is the perfect replacement for part number 520736, embodying the reliability and efficiency your system requires. Advanced Detection: Equipped with sophisticated sensors, the switch monitors water flow (red and blue lines) and temperature (white and green lines) in your chlorine salt system, enhancing system reliability by ensuring crucial parameters are met. Installer-Friendly: This product's installation process is straightforward with a design that fits 2, 3, and 4 wire systems. Included are easy-to-use button connectors for a secure and moisture-resistant connection, making setup a breeze. High Compatibility: The switch is meticulously crafted for optimal function with for Intellichlor equipment, ensuring your saltwater chlorination system runs smoothly without the hassle of frequent maintenance. Please note:the physical slightly color difference or difference, does not affect the use, please do not mind, thank you! Colour:Black & White Material:Plastic+Metal Package Contents: 1 * Swimming pool flow switch 1 * raw material belt (random color, no specification accepted) 4 * Terminals