McDonnell & Miller PSE801M-U-120 Boiler Low Water Cut-Off

Boiler Low Water Cut-Off, the McDonnell & Miller PSE801M-U-120 is a reliable electronic protection device designed for boiler systems. This low-water cutoff uses an extended barrel U-Probe and a manual reset to ensure precise level sensing for safe steam and water operation.

Engineered for versatility, it operates on 120 VAC at 50/60 Hz and supports a broad range of conditions: storage temperatures -40 to 120°F, ambient 32 to 120°F, and water temperatures up to 250°F. It handles steam up to 15 psi and water up to 160 psi, with robust UL (Canada and US) and ASME CSD-1 compliance for peace of mind.

• Extended Barrel U-Probe for precise sensing
• Manual Reset for easy fault recovery
• Electronic actuation with fast response
• Input: 120 VAC, 50/60 Hz; 125 VA
• Media handled: steam and water
• Operating range: -40 to 120°F (storage); 32 to 120°F (ambient); 250°F (water)
• Pressure ratings: 15 psi steam; 160 psi water
• Enclosure: NEMA 1
• Probe sensitivity: 7000 ohms
• Dimensions: 2-7/8 in L x 8.875 in W x 5-13/16 in H