My walls are 50 meters long and 40 meters wide, want to install the alarm on the walls, as long as the thief from my hospital wall 2 meters more than the alarm on it. The purpose is that the thief is not near my wall was found. Is there such an alarm?
The specific can find a local to do this company's advice, the request is not high will not spend too much
Buried, induction type, the cost is too expensive, if you do not consider the cost, you can use this, generally used to guard the airport perimeter.
If it is required to leave the wall a certain distance on the alarm is not climb the wall before the alarm, you can use wired infrared probe, a wide range of detection, detection distance of about ten meters
