Motion sensors are offered or use in hardwired or wireless systems. Being able to
place the sensors exactly where you need them without the hassle of wires makes
wireless motions sensors very popular and effective. Outdoor sensors are weatherproof
and have dawn/dusk sensor mechanisms to allow you monitor night time intruders.
Some have what's called pet immunity which means they do not go off when
a family pet moves around in a secure room or area.
The signal range
of the sensors varies from a few feet to 5000 square feet. Some units combine
both infrared and microwave signals to provide better protection. They have
many advantages over wired motion sensors.
Wireless motion sensors
can be placed anywhere in a room and some have swivel mounts to allow you to point
them at doorways or windows. | 
