Interlogix TX-E721 Wireless Pet-Immune Motion Detector for Simon XT/XTi, Concord, NX, Qolsys systems

The old sensors that came with my Simon XT system were complete crap. It was very difficult to remove the batteries. After we removed the batteries, we got lots of tamper alarms. We replaced the original sensors with the Interlogix TX-E721. The batteries, though not AA, were easy to install and the unit hook up with our Simon XT panel quickly and easily.

sensor was easy to pair with my control panel. the only problem is it did not include mounting bracket which makes it useless

Bought as a replacement for my current security system. Works perfect and as expected. Exactly what I ordered.

I called my service provider to replace this item and they wanted $150.00 for one, I replaced it myself for free. thanks, Happy Camper

I dont have pets, so I am unable to evaluate this sensors ability to ignore pets, but it does detect people.

Much better than the previous model. The battery are now very easy to replace.

I like it

I got this to supplement some window contact sensors in an entry room area. Works great and had no trouble adding it to my Simon XTi-5 system. Good purchase.