Replacement Temperature Sensor for Pentair MasterTemp and StaRite MaxETherm Pool and Spa Heaters This quality temperature sensor is designed as an exact replacement for Pentair part number 420020024S. It delivers reliable performance to help maintain safe operation and efficiency in compatible pool and spa heater systems. Key Benefits and Features: Exact Fit Replacement Compatible with Pentair MasterTemp pool and spa heater electrical systems and Pentair StaRite MaxETherm pool and spa heater electrical systems, including models SR200, SR333, and SR400. Direct replacement requires no modifications for installation. Critical Temperature Protection Monitors flue gas temperature to ensure it does not exceed 500°F. Operating temperature range: 20°C to 105°C. Protects heater components from overheating, helping prevent costly repairs. Durable Stainless Steel Construction Made from corrosionresistant stainless steel for longlasting performance in harsh pool and spa environments. Maintains accuracy and reliability even under moisture and chemical exposure. Resolves Common Heater Error Codes Addresses frequent issues such as E02, E05, and E06 error messages. Helps restore proper heater functionality quickly and effectively. Practical Applications: 1. Residential Pool Owners: Quickly a faulty temperature sensor to avoid heating interruptions during swim season. 2. Commercial Pool Operations: Minimize downtime by keeping replacement sensors on hand for usage facilities. 3. Spa Maintenance Professionals: Use as an exact OEMspec replacement to ensure manufacturerstandard performance for client systems. Specifications: Replacement part number: 420020024S Compatible heater models: Pentair MasterTemp and StaRite MaxETherm SR200, SR333, SR400 Temperature range: 20°C to 105°C Maximum flue gas protection: 500°F Stainless steel housing for corrosion resistance This sensor offers a simple, reliable way to maintain safety and performance in Pentair pool and spa heating systems.