Sensors you need to know for a home security system

With the ever increasing rate of crime and numberless people ending up being a victim of a burglary in many places, the use of home security systems has been at a record high. It is indispensable to mention that a wide range of home security systems available on the market makes use of different types of sensor technologies to meet requirements for customers. Before choosing the one that you deem suitable for your requirements, you must first educate yourself the knowledge on home security systems. This article aims to provide you a brief review of the sensor technologies (mostly motion sensors) that are being commonly used in home security systems.

Passive Infrared Sensors:
Passive infrared sensors, also known as the PIR, are one of the most commonly used motion sensors in a variety of home security systems. As the name suggests, a PIR is capable of detecting an infrared energy or the body heat. Once the sensor has been activated, it essentially creates a protective grid in the surrounding area. If a number of grid zones are being blocked by a moving object, it will lead to a rapid change in the infrared energy levels causing the alarm to be set off.

Microwave Sensors:
Although the microwave sensors are capable of covering a remarkably greater area as compared to the PIR, being costly and prone to electrical interferences are a few of the downsides associated with microwave sensors. Such sensors function by sending out microwave pulses and the reflection of the waves off a moving object is measured.

Dual Technology Motion Sensors:
Dual-technology motion sensors are your best bet if you are looking forward to getting rid of the false alarms. As the name suggests, a dual technology motion sensor combines two different types into one for the purpose of offering the best home security option. For instance, a dual technology motion sensor may be a combination of a PIR and a microwave sensor. Since one of these sensors works passively while the other one works actively, and the spectrums in which they function are also different, a dual technology motion sensor greatly reduces the probability of the alarm being falsely set off. Only when both the sensors have been triggered will the alarm be triggered.

Area Reflective Sensors:
Area reflective sensors work on essentially the same principle as the microwave sensors. It makes use of a LED to transmit infrared rays. The distance to the object or the person is calculated by measuring the reflected rays that are then used for identifying if the moving object is within the designated area. The ultrasonic motion sensors fall in the same category and work on exactly the same principle except that the emitted rays are ultrasonic in nature, as suggested by the name.

Vibration Sensors:
Vibration sensors are widely used in advanced home security systems. A vibration sensor usually works on electromechanical principle by employing a small mass on a lever, which can be activated when it vibrates.

While the above mentioned are a few of the commonly used sensor technologies in a home security system, certain variations of these sensors are also available. For instance, the same sensor technologies are also available in the wireless alternative which prevents you from the hassle of excessive drilling in order to set up the security system. A contact motion sensor and a video motion sensor are a few of the other prominent additions to the home security systems. While a dual technology motion sensor reduces the risk of false alarms, it may as well be coupled with the pet immune motion sensors which ignore the animals only up to a particular amount of weight and helps a great deal in further reducing the probability of your home security alarm being falsely set off.

Now that you are aware of the types of sensor technologies being used in the home security systems, you are in a much better position to choose the one that you deem suitable for your house. Remember to evaluate your requirements thoroughly before spending your money on a home security system. It’s absolutely worth spending a little more in order to have all of your requirements catered to.




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