Door Sensor

A lot of homeowners have installed home security systems in order to protect their families, home, and belongings and improve their level of security. These systems are comprised of several standard components such as a control panel, motion sensors, and a battery back-up system. However, there are other components that you can integrate into your home security systems such as door sensors. Along with glass break detectors and flood or smoke detectors, these are excellent options to consider.

The Function of Door Sensors

Door sensors serve the primary function of alerting a homeowner whenever a door is opened by a perpetrator. When the alarms are set, the door sensors send a signal to the central computer of the home security systems whenever the device is tripped by a door opening up to the home. At this point, the security systems will alert the monitoring company who in turn will contact law enforcement to investigate why the alarm has been tripped. Naturally, the monitoring company will contact you to determine if in fact that the alarm is legitimate.

Door sensors are an excellent option for renters and homeowners alike. A good idea is to purchase a door sensor that you mount to the top of the door in order to keep it out of sight. There are also door sensors that can be recessed into the door jam and door. Before making your purchase, you will need to determine which type will work best for you.

Glass Break DetectorGlass Break Detector

A glass break detector is a sensor used in electronic burglar alarms that detects if a pane of glass is shattered or broken. These sensors are commonly used near glass doors or glass store-front windows to detect if an intruder broke the glass and entered.

Glass break detectors usually use a microphone, which monitors any noise or vibrations coming from the glass. If the vibrations exceed a certain threshold (that is sometimes user selectable) they are analyzed by detector circuitry. Simpler detectors simply use narrowband microphones tuned to frequencies typical of glass shattering, and react to sound above certain threshold, whereas more complex designs compare the sound analysis to one or more glass-break profiles using signal transforms similar to DCT and FFT and react if both the amplitude threshold and statistically expressed similarity threshold are breached.