home security wireless
More advanced
home alarm systems may also contain vibration sensors to detect when glass has been broken by measuring the vibrations caused by the breakage. Also, many systems use motion sensors that compute the proximity of a room’s walls by producing infrared beams and measuring the time required for them to bounce back; if a beam comes back sooner than expected, it likely bounced off of a person and the sensor registers motion. The control center keeps track of the status of the sensors and reports activity through LCD displays and other output devices. Moreover, when activity takes places, such as the opening of a window, the sensors report the activity to the control center and the center registers that a disturbance has occurred. In managed alarm systems, the control panel also checks the sensors to
verify that they are still operational; if a sensor fails to reply, the center alerts the home owner of an out of order sensor. If the home owner activates the alarm system and the control center registers activity in the home, a signal is sent by the control to a buzzer, flashing lights or any other audiovisual alarm element.
ADT smoke sensors sound off if a fire is detected. ADT representatives are alerted and the fire department will be called. ADT provides a product option called ADT Pulse so that customers can arm and disarm their home security siren system remotely. The Pulse product uses a wireless modular device called a Z wave. The Z wave device connects to a remote device such as a laptop or mobile phone. For example, if an owner forgets to arm the security system before leaving home, she can turn it on from her computer at work or from her mobile phone. The Pulse system can also be set up for video monitoring of the interior and exterior of the home. Customers also receive an email or text alert if an interior or exterior siren is activated or a smoke detector goes off. An exterior siren goes off outside of the home; however, you can also hear it inside of the home. The reverse is true of an interior siren; however, the sound level will not be very pronounced outside of the home. The advantage of having audible sirens, whether the sound is louder inside or outside, is debatable.