Understanding Car Security

Whether you are looking at fitting a car alarm or immobiliser, they are both designed to take a power feed from the car battery. Some car alarms will also have a battery backup system should the battery drain on cars not used much, or someone tries to bypass your car security by disconnecting the battery.

Car Alarms Made Simple

A basic car alarm will protect your car with voltage sensors monitoring things like your interior lights, which would come on if someone opened a car door and possibly a shock sensor, which would detect the vibrations from someone attacking your car or trying to smash a window. More complicated alarms will additionally use ultrasonic sensors to monitor movement within the main cabin of the car or a combination of microwave sensors, which will detect a physical mass inside or even outside the car in the case of a dual zone alarm system.

Engine immobilisers in simple terms operate a switch, which will stop the ignition from starting or deactivate the full pump starving the engine or petrol or diesel. They search for a small radio frequency that is transmitted by the owner of the car keys, which usually has a small transmitting fob or bullet, which identifies them as being the owner of the car. Some car alarms have non-remote immobilisers as part of their functionality.