movement sensor

Hi all,

Wanting to add to a very custom security install a sensor that triggers when the car is moved- ie rolled. A tilt sensor is part of the system, but this wont trigger unless the car is .....tilted. I want to trigger the alarm when the car is rolled or pushed.

I guess it would need to be mounted under the car, looking a movement from the ground. Or perhaps off one of the car wheels.

Have thought about modifying a shop door sensor- the type that go 'bing' when you walk past or through the beam- infra red type. My concern is that it will be less sensitive (or won't work at all) at night. I would be fitting at least two and both must be activated before triggering the alarm-no false alarms from cats under the car etc.

Its part of a very secure alarm install-rings you when triggered, can ring the car back to remote start, need to ring the call also as part of the disarm procedure plus a whole heap more. Going onto a 1998 Subaru WRX STi-popular with the thieves here !

Any thoughts ?

Hey   Glynn,

DEI is the answer to your problems as they have two TILT/MOTION sensors available.  The first one is the 507T (a DEI product) and the 905085 (a Clifford product).  Both are self adjusting digital sensors with 0.5 to 3 degrees of tilt with motion sensitivity.  Whether you park on a hill or level ground, you just arm your system and walk away. . . as easy as that!  They are both dual stage with warn-away outputs but the Clifford is more of a universal product. 

thanks for your replys guys, but I'm sorry, thats  not  exactly what I'm after. I already am fitting a tilt/motion sensor -but these activate when the vehicle is tilted. I want something that activates when the car is rolled.

Yes, I am already locking the park brake. And yes I know about the netural/ AWD lock up, however its a manual. I know about all the other sensors and am fitting a large variety of them.

There will be know way a thief will be able to break into the car and it not activate. I have intergrated many 'back up' systems and varieing levels of protection.

 I am aware of the 'leaf or cat' under the car- that why I'll fit two or three of the 'sensors' (at each end of the car and one in the middle) and all three must be tripped to activate the alarm. This should eliminate almost all false alarms.

Imagine this, thief cuts brake cable from under car. Then pushes car down the road. No tilting, no breaking into car, just gently pushing car down the road. This is what I want to protect against.

Thinking caps on, any other suggestions ?

Quote: Glynn wrote:

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Imagine this, thief cuts brake cable from under car. Then pushes car down the road. No tilting, no breaking into car, just gently pushing car down the road. This is what I want to protect against.

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