I have to buy an alarm for my new house. The motion detectors exist in dual-technology (passive infrared and active detection using microwaves) or in simple technology (infrared only).
I know these detectors are continually working, even when the alarm is not activated (the red led blinking when you move) Do you know if the microwaves are also enable when the alarm is not activated ?
I'm not sure that this kind of waves are good for the health, even at low emission, when we are exposated all the year (for example, in a living-room).
Example of detector : http://www.thecrowgroup.com/files/support/SRX_2000A.pdf
Thx to give me your opinion.