McDonnell & Miller Series PSE Low Water Cut-off PSE-801U-120, 120V, Ext. Barrel, Electronic,
Series PSE-800For commercial steam boiler applications 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 settings. 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 senility threshold is exceeded. Standard Features. Green power in 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. Made in the USA.