| An alarm system is a great way to provide
| |
| | are generally smaller and very reliable.
|
| extra protection for your home. There are
| |
| | Vibration Sensors:
|
| plenty of options available for you to
| |
| | It detects a person through vibration.
|
| ensure your home's safety. So don't take
| |
| | Many car alarms have this feature to alert
|
| chances. Protect your family with a home
| |
| | the owner that something has bumped into
|
| security system that will safeguard your
| |
| | their car.
|
| most precious valuables, and the people
| |
| | Photoelectric Sensors:
|
| you love.
| |
| | Some motion detection systems use lasers
|
| What are they?
| |
| | and photoelectric beams. The laser is shot
|
| Motion detectors spot the movement in
| |
| | across to the other side of the room or
|
| areas covered by the security sensors.
| |
| | doorway. If the laser is interrupted the
|
| Motion detectors transmit high frequency
| |
| | unit's alarm signal is activated.
|
| radio wave signals. They give a warning
| |
| | Ultrasonic sensors :
|
| that someone is entering into your home.
| |
| | They use a frequency around 30kHz. The
|
| Different kinds of motion detectors & how
| |
| | transmitter bounces the waves of walls,
|
| they work:
| |
| | furniture, windows and ceilings and when
|
| Infrared Sensors:
| |
| | the room has stabilized, the alarm is
|
| Motion detectors use infrared light to
| |
| | armed.
|
| detect heat changes, i.e. when a person
| |
| | Acoustic Sensors:
|
| moves across this light it detects them
| |
| | They can detect the energy produced by any
|
| with the help of the infrared sensors. If
| |
| | kind of sound, including breaking glass.
|
| a person moves in the range of the motion
| |
| | In the case of breaking glass from window
|
| sensors, the alarm is activated. Infrared
| |
| | intrusions, the pattern of the sound
|
| sensors are cheaper than microwave sensors
| |
| | emitted is detected.
|
| and ultrasonic sensors. Infrared sensors
| |
| |
|
