What is the simplest way to detect a power outage?

[ogiewon]

@roberto

I would prefer a zigbee solution if available.

Another option is to build a power monitoring device from an inexpensive set of parts. See the following thread for ideas.

Power Circuit Monitoring for Power Loss

In a few weeks I am having a sump pump installed in my crawl space because of on going water issues. I have a receptacle in the area of the pump that is tied into a GFIC outlet. For obvious reasons I want to be notified if this outlet ever loses power. I saw @Cobra and @Navat604 old posts on the ST community Curious if these solutions are still working or if there are better ideas. @Navat604 what relay did you use in your contact sensor? It is very small and appears like you have it in…