Zigbee device that help tell if outlet power is off

One approach is to make a device like the one linked below (and there are many examples of such devices on the Hubitat community).

I have two of these that have worked well for ~3+ years.

With this kind of device, the contact will appear "closed" when there is power, and "open" when there is no power.

I haven't had to change the batteries since I built them.

TheSmartestHouse.com also sells a Power Outage Detection Kit, that they are currently out of, but it works on a similar principle.

https://www.thesmartesthouse.com/collections/z-wave-kits/products/diy-smart-power-outage-monitoring-kit

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