Gems^® Series 26 controllers are designed for boiler low-water cutoff protection. A snap-through standoff mounting device is available as well as an optional power outage feature on this series.  The optional reset button is used when the device has been deactivated because of low-water condition. A reset is functional only if water has returned to normal level. These units have a built-in 3 second time delay and can be programmed up to 90 seconds for increasing and decreasing levels.