Specifications: Type: Pool and Spa Heater Thermistor Sensor Part Number: 42001-0053S Material: Stainless Steel Temperature Range: -20°C to 80°C Features: Precise Temperature Monitoring: This thermistor sensor provides accurate water temperature readings, ensuring your pool or spa heater operates at its best. It helps maintain a stable, comfortable temperature for a great swimming or spa experience. Compatible Replacement: The 42001-0053S sensor is engineered to match the original part's specifications, making it a perfect replacement for select Pentair pool and spa heaters. Its precise fit ensures a secure, proper installation without any modifications. Durable and Reliable: Made with high-quality stainless steel and corrosion-resistant materials, this sensor is built to last in harsh pool and spa environments. It works effectively from -20°C to 80°C, providing long-term reliability and protecting your heater's key components. Easy Installation: Replacing your old sensor is simple and requires no specialized tools. Just remove the old part and install the new 42001-0053S sensor to quickly restore accurate temperature readings and keep your heating system running smoothly.