You seem pretty knowledgable can I ask a question or two?
Limiting the cat is not an option, he would just scratch a doors lol. Would you then just fit a DT Sensor?
Also we had a Scantronic Ion 40 alarm fitted previously and this has been changed over to the Orisec one. We kept the old wired PIR (scantronic) as we were told they would work fine but now we are finding they are sometimes not even picking up someone walking past. I know they are just a sensor and a sensor is a sensor but I cant understand why this would be apart from a compatibility issue (which should not really happen).