【Durable Materials】: Our temperature sensor is made of high quality PP and EPDM, it can withstand the harsh pool and spa environmen and endure exposure to chlorine, bromine, and other chemicals present in pool water, as well as temperature variations. The robust construction ensures long - term reliability, reducing the need for frequent replacements. You can count on this sensor to keep working efficiently season after season, providing stable temperature monitoring for your pool and spa heaters. 【Replace Part Number】: The replacement part numbers for this pool heater temperature sensor are R0456500, R0523900, R0477300, R0456600. 【Fit for】: This temperature sensor fits for Zodiac Jandy LXi 250, 300, 400 Pool and Spa Heater Models; JXi 200, 260, 400 Pool and Spa Heater Models; Legacy LRZE 125, 175, 250, 325, 400 Pool and Spa Heater Models; Legacy LRZM 125, 175, 250, 325, 400 Pool and Spa Heater Models. 【UL Certified】: This temperature sensor has passed the Global UL quality inspection certification, complying with stringent production safety standards, ensuring that the product is not only of high quality but also safe and reliable. 【Easy Installation】: Installing this temperature sensor is straightforward. First, turn off the pool spa heater. Then, locate the temperature sensor port on the pool spa heater. Insert the temperature sensor into the port and secure it tightly. Connect the wiring following the manual. Finally, power on the pool spa heater, and the temperature sensor will start accurately monitoring the temperature. 【Package Included】: 1 × Pool Spa Heater Temperature Sensor. Durable Materials: Our temperature sensor is made of high quality PP and EPDM, it can withstand the harsh pool and spa environmen and endure exposure to chlorine, bromine, and other chemicals present in pool water, as well as temperature variations. The robust construction ensures long - term reliability, reducing the need for frequent replacements. You can count on this sensor to keep working efficiently season after season, providing stable temperature monitoring for your pool and spa heaters.