Specifications

MICROWAVE SENSOR (model dependant)

Microwave (or Radar) sensors work in a similar way to ultrasonic’s in that they

send

out a signal and monitor its return. The advantage over ultrasonic’s is that

they do not detect any change in air pressure and are therefore better suited to

convertible vehicles.

Mounting

Microwave signals will travel through virtually everything exc

ept metal

so it is important that you consider the mounting location of the sensor carefully to

avoid any ”shadows” from dashboards, consoles, handbrakes, switches etc.

They also work better and are more stable in their performance if they are mounted

dir

ectly onto a flat surface. Therefore, the best place to mount a microwave sensor

is in the roof facing down as there are no shadows and have an unobstructed

“view” of the cabin interior. Be aware though that the headlining in some cars

contains aluminium f

oil in their construction which will block the signal. Attaching the

sensor to the roof lining is preferred as to mounting to metal of roof as the high

temperatures in the summer can cause sensors to false or even fail completely.

Other location options a

re the centre console area, although you must keep the

sensor away from spare keys or coins and electric switches, or the front of the

vehicle facing to the rear, or behind the back seat facing forward.

Another consideration in mounting a microwave sensor

is that it must be mounted

along the centre line of the vehicle to give even detection coverage of the interior

of the vehicle. As this position is not always acceptable or viable one other area is

to mount under either front seat, adjusted accordingly.

Wiring

It is most important that the earth wire to the sensor is kept as short as

possible and grounded . The earth wire must not be connected to the alarm control

module earth. Once again the power supply wire to the sensor must also be

separate from th

e alarm and shock sensor power supplies.

GLASS BREAKAGE SENSOR (model dependant)

These sensors detect the frequency of breaking glass. Some sensors can be

unreliable if they do not contain an analysing circuit and can false alarm when

detecting certain am

bient noises such as emergency vehicle sirens, jet engine

noise from aircraft, or some loud motorbikes.