Pentair 471566 Thermistor Probe Replacement Pool/Spa Pump and Heater
This thermistor probe is designed to use with Pentair MiniMax NT STD, NT LN, NT TSI pool and spa heater models 200, 250, 300, 400 and also compatible with UltraTemp and ThermalFlo pool and spa heat pumps. Measures 1-inch length by 2-inch height by 1-inch width.