Intruder Alarm System is also called Burglar Alarm is a very important tool in Security Systems. Incase of intrusion or burglary the siren will make very loud sound which can scare the intruder, at the same time the control panel can dial the police control room to send the alarm signal with the site information so that the police can reach the site to take appropriate action.
Intruder Alarm System is designed using Control Panel, Sensors, Siren or Sounder and auto dialer. The Control Panel is the heart of the system which receives signals from all the sensors. Different types of sensors are used for different locations. for doors and windows door contacts or magnetic contacts are used. When the door is opened or closed the signal is sent to the control panel. For glass doors and windows glass break detectors are used. This sensor sends the signal to the control panel when the glass is broken. If there is movement in the protected site Motion Detectors are used. There are two types of motion detectors available. Passive Infra Red (PIR) or dualtech where the sensing is through both IR and Microwave rays.
In case of panic situation panic buttons or kick bars can be used to send panic alarm to the monitoring station. For safe boxes or safe rooms vibration sensors can be installed which detects any vibration caused by explosives or tamper. The site to be protected can be installed with these sensors along with control panel and a siren. Sirens make very loud sound with strobe light which flashes at the time of alarm.
A keypad is used for programming, arming and disarming the system. The system is armed using a four digit code. If the system is in disarmed state it will be in standby mode. The system is active only when it is armed. The system can be armed either in Away or Stay modes. In Away mode all the sensors will be active. This mode is used when every person from the house or the protected site leaves. In the night when people are staying in the protected site the system is armed in Stay mode. In Stay mode all the sensors will active except the motion detectors.