Eithernet relays

I need to place a relay at one location in our plant have a input give me a relay closure at another location for alarm. Not sure wireless because of brick wall steel structure of building. I`m wanting to have a input at a relay board and output at another. Hope this makes since Thanks which product suggest. one relay per board should be all I need. High level for a sump.

I would recommend trying this product:

It is wireless but it is long range wireless(900mhz) with a range of up to 2 miles.

If the product does not work for your application we have a 30 day return policy for refund.

Yes I`m concerned about wireless working do they have similar relays that work over eithernet?

There is also this version: https://store.ncd.io/product/ethernet-internet-contact-closure-remote-spdt-relay-controller-1-channel-1-way/ which works over ethernet.

The ethernet version does require setup for your network which is covered in the guide: Ethernet Mirror Configuration with NCD5500 Gen 3 Ethernet Module - ncd.io