My need was to have a sensor that could send an alarm when the pressure in my Co2 Tank, which provides carbonation for my home brew, fell below 20 psi indicating the tank needed to be refilled.
GoControl Z-Wave Door/Window Sensor - WADWAZ-1
Pressure Switch QPM11-NC (eBay)
The two main components with the cover removed from the door/window
Marking location to cut plastic housing to align pressure switch pins to
magnetic sensor pins.
circuit board and cut out plastic housing.
may change depending on the components used, but were the measured dimensions of the cut out and hole
for this particular build.
drill adjustment hole approximately 9/64” diameter.
magnet sensor with pliers and bend up the two wire pins to outside width of
and epoxy to housing.
circuit board pins to switch pins, install battery, and screw cover into place.
pressure switch mounted on gauge set. The switch adjustment screw was set to
close switch when pressure drops to 20 psi. I normally feed the secondary
regulators at 30 psi.