It's a nice solution, but I can't use computercraft on this map, beacuse the guy who asked me to make it doesn't want (I don't know why, maybe server issues). So i have to do the circuit using only gates and redpower. lol
Thanks anyway
EDIT: NOR gate does not works. I need something like this.
TEMP MONITOR ---> CABLE1 --->ALARM ---> CABLE 2---> WIRELESS TRANSMITTER
I just need something (a gate or other stuff) that can "break" the CABLE 2 when i push a lever, so the input from the temp monitor will only activate an alarm, without switching off the reactor.