I am looking for a lead/link or information so as to expand my very thin knowledge of induced Harmonics in Computer Intensive electrical distribution systems in commercial premises.
Any Info would be of assistance as I knowledge challenged in this area.
CJ
The other option would be Infra Red, again this depends upon the environment, is there dust etc present and you would need line of site between the two units (Send and receive). Will the alarm need a reset function, will there be more than one unit etc.