There are many manufacturers of motion detectors to choose from but SEM
Security Systems usually sticks with DSC's line sensors. There are a host of
different detectors to choose from but we typically use the LC-100. This is a
pet immune motion detector with adjustable sensitivity and has proven very
reliable and trouble free. You can view their complete line of sensors here.
SEM Security Systems
a division of Southeast Mobility
Inc
Motion Detectors