I worked in an industrial design company for such things and when safety was involved you could only use wire. For monitoring that was a different issue but for safety where lives were at stake then you went wired, added horns, bells, lights and such to meet the local code.
Don't do this without checking codes.
With that out of the way there are companies that do this and can get you up to about a mile away for about 1,500 bucks per device. Installation, modification and such are of course not included.
I work in a large plant that has many remote sprinker systems. I am looking for an addressable wireless Sw N.O. or N.C. that when activated will connect to my wireless system and let me know whitch remote station has went off.