An auto limit switch like the 4520-2048-000 automatically closes the circuit once the system cools down

enabling the operation of bleed-type sensors and ensuring the master controller receives accurate input signals

Whether you're working on a district regulator station or a high-precision industrial meter set

it eliminates the mechanical failure points found in traditional electromagnetic relays

McDonnell & Miller P-1-SS Probe Rod An auto limit switch likeThe McDonnell & Miller P 1 SS Probe Rod (Part Number 179530) is a critical component for high precision liquid level control in hdyronic and steam systems. Engineered from 12 inch 316 stainless steel, this probe rod provides superior corrosion resistance and structural integrity for long term immersion in boiler environments. Designed for seamless integration with RS series sensors, the P 1 SS is commonly utilized with PCH, PCL, and LPC 2000 liquid