the fitting is optimized for both soldering and brazing

Key Benefits Precise Multi-Stage Sequencing: Controls up to three stages of heating or cooling from a single sensing point to prevent short-cycling

Direct OEM Compatibility: Verified to replace Modine 53709 and original DSI ignitor assemblies in Modine unit heaters like the MHR30

the 8-foot leads can be wired to the S1 and S2 terminals regardless of polarity

By allowing for two distinct mounting orientations

Siemens Building Technology QAA2230.EWSN Sensor 321894-709 the fitting is optimized forThe Siemens Building Technology QAA2230. EWSN is a professional grade room temperature sensor engineered for precise environmental monitoring in commercial and industrial HVAC applications. This 10k Ohm Type 2 thermistor offers high accuracy sensing within a range of 32F to 122F (0C to 50C), making it a staple for Building Automation Systems (BAS) requiring reliable NTC resistance signals. Designed as a "blank front" unit, the EWSN model features no