jonkeyne

Thanks for the information, I shall check out the pir as you suggested.

I have inherited an alarm system in my house. One of the detectors is now regularly giving false alarms, and I have searched to see if spiders are the cause but have not found any. So I assume that I need to replace the detector which is a Pyronix Enforcer super 15m range PIR. I understand that these are no longer produced, so can you please recommend a suitable replacement that will be a simple swap over. It has 4 wires going to it, I believe that 1 pair is for tamper detection, and one for the alarm signal. Many Thanks Jon