Which type of sensor is most common in vehicle security systems, and may even be built into the main control unit?
If you are talking about a stock security system installed in most vehicles then none of them on your list. The stock security system is almost always triggered by opening a door to the vehicle while the alarm is armed (interior light going on caused the alarm to trigger).
An after market alarm will tend to use a Shock Sensor or what you call an impact sensor. This is mounted under the steering column and best detects shocks throughout the vehicle such as someone smacking the glass or other part of the vehicle.
All of the other sensors you listed can also be added to most aftermarket system. the glass sensor does the same thing for the most part as the shock sensor. The pressure sensor could tell if the vehicle is being lifted or moved without shock. The Motion sensor will alarm if someone sticks their hand through your open window.
All have a different purpose but the most common is the Shock sensor.
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