The Series PSE-800 probe type LWCO uses patented technology to monitor changes in water conductivity. When defined parameters are exceeded the new PSE-800 makes a decision to shut the burner off based on the volatility/variability of the resistance readings. This new patented technology provides the best protection possible without turning off the boiler unless a low water condition exists. As an added measure of safety, the control will turn off the boiler if it recognizes an out-of-water condition when the sensitivity threshold is exceeded.

Features and Benefits

• Green power is on indicating LED
• Red low water indicating LED
• 30 second DOM
• Test button
• Self-Cleaning probe
• No lock out with loss of power if probe is in water
• Provisions to add water feeder of alarm
• Models available with:
• 120 VAC
• 24 VAC (meets ANSIZ21.13a specification)
• “U” probe (extended barrel)
• “FIX2” probe (remote)

How to Buy

McDonnell & Miller

McDonnell & Miller is a leader in engineering and manufacturing boiler controls, liquid level controls, low-water cutoffs, and flow switches for steam and hot water boilers in industrial, commercial, and building trades applications.

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Mcdonnell & Miller 120volt Steam Boiler Low Water Cutoff.