this model is designed for hot water or two-pipe steam

Always verify ductwork sizing and check the drip loop on the wiring harness during installation

Featuring a measurement range from -60°F to 182°F with an accuracy of ±2°F

you can always upgrade the voltage rating as long as the 15 MFD capacitance remains the same

It is a direct OEM replacement HVAC board designed to interface seamlessly with existing wiring harnesses

Siemens Building Technology 544-577-40 Sensor 30067439-890 this model is designed forThe Siemens 544 577 40 is a heavy duty liquid immersion temperature sensor engineered for precision monitoring in HVAC hydronic systems. This unit features a high accuracy 1k Ohm Platinum RTD (Ref. 375a Alpha) sensing element, providing stable and linear resistance output across a broad operating range of 0F to 250F ( 18C to 121C). Designed for direct mounting into piping systems, it includes a 4 inch stainless steel probe and a matched thermowell to