In the alarm, an external impact on the car is recorded using a shock sensor, and the information is transmitted to the owner in time. Automotive sensors may differ in physical principle, but their algorithm of operation is practically the same: when an outside influence on the car, they send a digital or analog signal to the system.
There are many points of view about staging a shock sensor. Moreover, they are radically different from each other. According to some experts, the device should be installed on metal body parts with a strong and rigid attachment to the automotive surface. This point of view has one very significant drawback: iron dampens the amplitude of the oscillations, so the operation of the sensor can be poorly effective. If you set the maximum sensitivity in the device settings, the alarm can start to work for any reason and cause a conflict with others.
Other masters of their craft advise putting the sensor on the wiring harnesses, using plastic cable ties as fasteners.
Other companies install sensors in the center of the car, explaining that this is the most suitable place for the sensor. Here, the device provides the same sensitivity to impacts in different parts of the car body. In this case, the sensor should be well fixed in order to avoid false alarms.
Recently, devices have been installed on the main alarm electronic board. This solution is very economical, but damages the operation of the sensor, since it is almost impossible to find a place on the car for installing such a board: it must provide optimal sensitivity to external influences, and at the same time, it must be difficult for hijackers to access.
Ultimately, the correct positioning of the sensor is determined by the stability and accuracy of its response to external influences, as well as the absence of false alarms under extraneous or minor influences, for example, with gusts of wind, or loud sound effects that drove past a truck with a loud exhaust.
