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The integrated SPDT end switch allows for seamless sequence of operation signaling
In many installations
remove and inspect the probe annually
For space temperature control
Durable Construction: Features a high-quality diaphragm and robust electrical contacts to withstand high-temperature HVAC environments
McDonnell & Miller FS7-4SJ Snap Switch Els PW 29614 The integrated SPDT end switchThe McDonnell & Miller FS7 4SJ (Part Number 120171) is a rugged, industrial grade liquid flow switch designed for high pressure applications where standard brass units fall short. This SPDT snap switch features a durable stainless steel body and wetted parts, allowing it to withstand a maximum pressure of 1000 PSI. Built with a 1 1 4" BSPT connection, it is engineered for precise flow sensing in large pipe systems across hydronic heating, industrial