How Does A Car Alarm Work?

It might sound simple to some, but some customers have never had a car or van alarm fitted before. A car alarm is normally used to prevent your vehicle being attacked or stolen. In most cases fitting an alarm also reduces insurance cost. So what does an alarm protect on your vehicle and how does it work?

Bonnet Protection

Car alarms feature a bonnet pin / switch which is installed in order to make the alarm trigger if the bonnet is opened when the alarm is active. On some vehicles a bonnet pin doesn't need to be installed due to the data network known as can-bus detects when it has been opened.

Interior Protection

Car alarms protect your interior of your vehicle by using interior sensors known as ultrasonics or a microwave sensor. These sensors work by detecting a change in area pressure or breaking the invisible electronic field. Once the sensor is tripped the alarm will sound.

Door and Boot Protection

The door and boot zones are protected via the pins / switches that are factory fitted on the doors as factory standard. These are the same pins that make the interior light turn on once you open the door. 

Siren / Sounder

The siren is the part that makes the noise known as a sounder, these are normally around 120db in terms of loudness. Some of these feature an internal battery which means the siren will keep sounding if the wires are attacked.

Feel free to look at our selection of high quality alarms.