My car get scrachs every several days by someone on purpose. I want to use this sensor to detect anybody close to my car. Now I'm thinking of using DEI 508D motion sensor. Anyone knows it maxmum radius coverage range? My car has a total length of 4.7 meters. If I install it inside my car on the floor between two front seats. Can such installation covers from front bumper to rear bumper? What if installed on the roof inside the car? Any other products can satisfty?
When the sensor detect motion, I want a 30 seconds 12v current(to turn a light, or run a cassette player). Can I use 'DEI CAR ALARM SECURITY 12 VOLT PULSE TIMER TIMED RELAY 528T' to receive trigger pulse from the motion sensor, then connect my circuit for 30 seconds?