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Models include 5-1/2” sensing element
Integrated Auxiliary Switch: The internal SPDT switch simplifies the wiring of end-stop verification or secondary equipment triggers
Easy Installation: Standard 2-wire lead terminals and mounting brackets allow for a fast swap during service calls
providing a clean and secure professional finish
this rugged unit maintains stable discharge air temperatures in harsh environments
Lochinvar & A.O. Smith 100170487 Upper Sensor 321042-401 Models include 5-1/2” sensing elementThe Lochinvar & A. O. Smith 100170487 Upper Sensor (formerly TST1187) is a critical thermistor based component engineered for high precision temperature monitoring in residential and commercial water heaters. As a direct immersion NTC temperature sensor, it provides real time resistance feedback to the control board, ensuring the appliance maintains optimal setpoints while preventing dangerous high limit conditions. This OEM water heater sensor is
US$ 147.50
US$ 28.50
US$ 260.00
