Motion Detector Tamper Switches Offer Inherent Safeguards

There is no use spending good money on a motion detector equipped with a tamper switch if you don’t use it. Of course, many motion detectors manufactured today do not employ tamper switches. Yet the multitude of units installed each year that do offer this added feature need to be connected properly. And this does not mean tied in series with the NC contacts of the protective loop output of the detector.

Properly connected tamper switches should be tied into a 24 hour day night zone while the general burglar alarm system is off. This is done to detect inside covert attempts to disable the motion detectors’ capabilities before the system is armed at night.

Of course, this may require a company to run an extra pair of wires to each detector or employ a separate addressable module.

If the tamper switches are simply tied into the burglar alarm circuit, it is highly unlikely they will ever be utilized. In most cases, an intruder would not be able to reach the detector and remove its cover to attempt circumvention, without first being detected by the sensor itself.

The contentions by many installers who say tamper switches do not work or cause false alarms are ludicrous. Indeed, if the tamper switches are problematic, the alarm company should choose another manufacturer’s detector—period. Maybe then the makers of these unreliable devices would stop producing inferior equipment.


Excerpt taken from The Alarm Science Manual, by Jeffrey Zwirn!