Building a remote water valve. The valve motor limit switchs provides full line voltage when limit is achieved. I want to use this for transmission of feedback to the controler.

I know I can use transformers or relays, but it seems there must be a more elegant way. 120 volt relays are bigger than I like, as are transformers. Considered using current sensors which would signal limit achieved or an open connection, but that would not warn me about open trouble.

I will probably wind up making my own optocoupler with the smallest 120v bulb I can find unless I can find a better ready made solution.

Any thoughts will be appreciated.

AMay