McDonnell & Miller Series PSE Probe Type LWCO

By January 28, 2017 Blog, Boilers and boiler controls


The McDonnel & Miller PSE-800 series 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)