Home Alarm Sensors
Home Alarm Sensors
A home alarm system is an integral part of a complete home security system. A good home alarm deters thieves, but it is also a mechanism by which they slow them down and reduce the possibility that they will damage your things in the event of theft.
Perhaps the most crucial element of a home alarm is the sensor. They can detect activity in and around the house by taking various observations and sending them to a central control panel. Understanding the different types of sensors and their different functions is an important step in planning your own security system. The following is a brief introduction to the basic types of sensors available to homeowners.
windows and doors
Auto switches are often used for windows and doors and consist of two magnetic elements, one on . The window or door frame and the other on the window or door itself. When the door or window is opened, the elements are removed and if the system is turned on, an alarm is triggered. A sensor like this would not trigger the alarm system if a thief broke the window and entered without separating the elements.
Pressure sensors can add an extra layer of security to window entrances. Pressure sensitive area rugs are place under the carpet or other floor at the bottom of the window. When the system is turn on, the weight of a person in the hiding place will have to trigger an alarm.
Glass break detectors use highly developed acoustic technology to trigger an alarm when detecting window or door breakage. These detectors have highly customized sound sensors that can distinguish the sound of . An object hitting glass and the sound of broken glass immediately afterward. In general, one unit is enough to cover one room.
Passive infrared sensors use advanced technology to detect . The presence of an uninvited host by identifying changes in air temperature due to body heat.
Ultrasonic sensors emit sound
Ultrasonic sensors emit sound waves, which are return to the sensor. Movement in space changes the pattern of waves that return to the sensor and trigger the alarm. Sound waves emit by ultrasonic sensors can be move by strong . Air currents, such as from a heating and cooling system, so a careful assessment of the air currents in the room should be make prior to installation.
Microwave sensors work in the same way as ultrasonic sensors, but they use microwave radio waves instead of sound waves. These waves are not affect by drafts and can . Therefore be use as an alternative to ultrasonic systems in rooms with powerful air conditioning or heating units. However, microwave radio waves are strong and can trigger alarms due to motion detected beyond the selected limit. As such, careful evaluation and consultation with a professional is recommend if using such a system.