Shock v. Glass v. Radar. Best Sense?

a good quality shock/impact sensor will be your best for reliability and lack of falsingKevin Gerry

Certified Electronics Technician

MECP First Class Installer

Owner/Installer

Classic Car Audio

since 1979

Sensor(s) 101: 1. Buying a known quality sensor from a alarm maker. 2. Install it in the correct place which offer the most uniform and balanced sensing. 3. Affix the sensor with the correct hardware. Many people use zip ties, double sided tape, velcro etc. I prefer to use SS sheet metal screws. 4. Ground the sensor to actual chassis / frame using a star washer, and ensure the shortest cable length. 5. Adjust the sensor(s) semi-anually to ensure consistent protection and coverage. This will reduce the amount of false alarms. A) A shock / motion sensor is intended to detect impact to the chassis. There are still many rubber band units around. The next level is the use of piezeo crystal. The next is micro processed time delay with piezeo detection. B) A radar sensor is intended to provide the vehicle and the owner / theif notification that an alarm is present. Which can either alert you, or them to come or go. There are many forms of radar, doplar, infrasonic, ultra sonic sensors. Again the brand, and the manufacture dictate as to how well they perform. But it is up to the user to apply them in such a manner so as they prove effective and do what they are intended for. They all have a level of *attack / decay* which you must allow for and compensate for. The so called glass sensor that is being sold by the many makers are no more than noise sensors. A true glass detector measures and is tuned to the frequency of breaking glass. All of which are affected by tint, surface area, and the tools of the trade to circumvent them. They are 1001 things I could tell you about any sensor(s). You as the user, must know, and fully understand what it is your trying to do. 1. Protect the vehicle? 2. Protect the contents of the vehicle? 3. Provide you, the owner or thief a measure of notification? 4. All of the above? Regards EVIL Teken

glass is intended for people who actually know how to break a window with out shock.  otherwise a shock sensor covers the window.  thats why they tend to false from motorcycles and other heavy vibration sources.  they dont know the differance, but its good to know theyd go off if a window was smashed.  the glass sensor is designed to keep out a higher level of theif that uses pressure to pop a window with minimal impact.

if you are worried about someone just using a slim jim, dont you have the door triggers hooked up?  besides if a window get smashed... the theif will usually unlock the door and open it, again thats what the door trigger is for.on a final note, i hate my proxy sensor.  its a perfect install but it will false out of no where.  it could false 5 seconds after you arm it, or a day later just sitting in the same spot all alone in the garage.  i unplugged the thing and im not even going to bother takeing it out.  as far as im concerned im saving someone else the trouble of trying to make it work.  DEI usually has a great product but i hate that thing.

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