Broadly speaking, how does the water pressure sensor in a boiler work? I'm told there are 3 wires from it.. how might that work (i.e. it doesn't just present itself as a simple on/off switch, then)
Boiler water pressure sensor
Feb 23, 2012
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Information here may be outdated?
Probably power, neutral, and a variable data signal, dependent on the pressure. That's how industrial ones are.
depends on the boiler.
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