Best way to mount sensors

I have 3 sensors that I have to mount in my car. What is the best place/way to mount them? I have a dual-stage shock sensor, and audio (glass) sensor with a microphone (where to mount the mic???), and a tilt sensor.

Mounting anything is dependant upon the year, make and model of vehicle. Normally, you would mount the said sensor(s) where it will recieve (pick-up) the most consistent, and even coverage of the vehicle from a 360 area. Using the correct hardware or fasteners, will affect the sensitivity of the sensor(s). ie. adhesive glue(s), double sided tape, velcro, plastic zip ties, or screws. Regardless of that, I always suggest that you install only one sensor at a time, untill it has been fully tested to provide consistent and dependable pick up of intrusion whether it be from impact, shock, sound, microwave, or height. If you simply install all three sensors without fully testing them for a period of time. You will never know for a fact if it performs as desired. Remember to diode isolate all sensor(s) if the unit is not so equiped to recieve more than one input. You should also use a star washer and SS screws to secure the ground wire. Regards EVIL Teken . . .

Thanks for the reply, but are there any general rules, like what surface a certain sensor should be attached? A wire loom or onto the firewall or another hard surface?

You know alot of installers secure the shock / impact sensor to the steering column, or around some sort of harness. Sometimes this works fine, other times it simply masks the problems that will arise. ie. Sensor is too front heavy. Meaning the sensor picks up front end impact / shocks with a drop of dime, while the rear end is clueless. I personally affix all the sensors to a hard surface with SS screws to the frame of the vehicle. It matters not if it is the fire wall or a tube frame, so long as it picks up the impact around the vehicle consistently. If the sensor can pick up the shock / impact at its lowest setting all around the vehicle then you need to reduce the level of sensitivity with some form of insulator, like double sided foam tape along with the SS screws. It is consistentcy, and coverage I always aim for. Lastly, you should always test the sensor(s) and adjust as required 2 times a year, winter and summer being the most problematic seasons. Keep the sensors away from ventalation ducts which cause creeks and pops, keep it away from any form of RF / EMI devices. Regards EVIL Teken . . .