I have a video intercom with two alarm inputs for wired door sensors. I can't run wires to these two doors; do they make a wireless door sensor with a receiver and a relay?
What benefit does hooking up sensors provide?
With many common alarm systems from companies like Honeywell and DSC, it's possible to add a module that provides additional outputs and program outputs as zone followers for a specific zone or group of zones.
Inovonics does make wireless receivers that provide relay outputs. And sensors that work with them like
this and
this one that you wire a sensor to
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Kind of an expensive solution.
You could also do this with a home automation system and zigbee or zwave sensors and relay output module of some kind.
There are probably cheaper options if you look hard enough.