Types of Sensors Home Alarm System
Category Sci/Tech | Saturday, September 4th, 2010choosing a home alarm system, there are a number of factors that you should buy last case before you. Probably at the top of your list of considerations alarm type. However, it is also necessary to decide which type of sensors that you want to install. The sensors are the most important component of your home alarm system. These are your property to detect intruders. Here is a list of the most common sensors on the market.
Passiveinfrared motion detector
PIR detectors are one of the most commonly used in alarm systems at home because of their affordability and convenience. The term refers to the fact that these passive sensors without the need to generate and radiate its energy function. These types of alarm systems can detect body heat in temperature, or rather changes in temperature. When the PIR detects a peak temperature caused by the presence of a foreign body orIntruder will be postponed. However, the alarm is usually set immediately, so that areas to distinguish between the temperature sensors to determine whether it is actually an intruder. The delay also allows the homeowner to turn positive 's warning of wrong. The energy does not happen as glass infrared, passersby can not accidentally trigger the alarm.
Ultrasonic Detectors
These sensors use high frequency sound wavesdetect motion within a confined space. Frequencies inaudible to the human ear are between 25 kHz and 75 kHz, transferred, and bounced off the walls, furniture and ceilings in a protected space. Using the Doppler principle to recognize the motion sensor can result in a shift in the frequency has stabilized, any moving object that changes the protected area to reach the frequency of the sound environment. This change triggers the alarm system at home.
MicrowaveDetectors
This feature detectors in a manner similar to ultrasound, but instead of sound waves, using high-frequency radio waves. You can walk through walls, unlike ultrasonic waves.
magnetic switch
These are generally used to protect doors and windows. It is a popular choice because of their reliability, durability and ease of use. Homeowners can easily install it themselves, they consist of two distinct parts, the magnet and switch. Contains a swichSpring, when closed, creates an electrical circuit with the magnet. When a door or window is opened breaking the circuit, so that the alarm is activated.
Glass breakage detector
The sound of broken glass is available in a wide frequency band of infra-sound, people can not hear on ultrasound, audible even to humans. Glass break detectors are left next to glass panels are installed and, if the glass is broken.
Sensors
This detects the presence of aIntrusion infrared, which are usually stacked in rows of two or more. If anyone prevents a beam, home alarm system expires.
Vibration sensors
These devices are in some sort of obstacle like a fence installed to detect and vibration. The sensors can be tuned to hear the wind noise levels or vibration, which is especially helpful in reducing false alarms by animals a.