Originally Posted By: haertig
I'd like to try motion sensors. But with a lumbering 150lb Newfoundland, an 80lb German Shepard, and a Jack Russel Terrier constantly chasing the two cats around I'm afraid our house is a lost cause. The birds are gone now, but they used to add to the ruckus by flying around daring the cats to catch them. I think motion detectors are out until our zoo quiets down! On the other hand, nobody sneaks into our house without causing a tornado of activity and barking. No silent entry here!


As long as you have no birds, glassbreak detectors are a good option. They work by picking up the high-frequency sound of glass breaking. Birds seem to cause a lot of problems with them though.

A glassbreak detector is pretty much useless if you don't have the windows contacted though, because it doesn't detect the window being opened, just the glass breaking. Most standard glassbreaks will cover a 25' radius from the device when ceiling-mounted. So you can cover an average-sized room or possibly even more than one room with one detector.