A motion sensor is a relatively simple electronic device that can sense motion and generate an electric signal based on the optical or acoustical changes caused by that movement. Most of the sensors used in common commercial applications use microwave, infrared or optical technology to sense movement within their field of vision. Motion detection sensors are used in a variety of products and for a variety of reasons these days. Some examples of where you will find a motion sensor include commercial lighting fixtures, traffic lights, automatic doors, exterior security lamps and video surveillance cameras.
Motion Detectors for Burglar Alarms
A motion sensor is also a key component of any burglar alarm system for the home or for commercial buildings. They are used to detect the presence of burglars and other intruders in a home or office building, and to trigger an alert based on that detection. Motion detection sensors can be installed at various points inside a building, and are especially useful for monitoring basements as well as dimly lit corridors and hallways. They can also be deployed along the perimeter and the exterior of a building as an added layer of protection.
How They Work
When a motion sensor is used as part of a burglar alarm system, it is either hard-wired to a separate central communications control, or wirelessly connected to it. The console is there to receive alerts from the sensor and to trigger an alarm based on that alert. In most cases, the console communicates the alert to a monitoring center, which then initiates a response. In other cases, the consoles are standalone models that are used purely to generate a loud alarm to alert homeowners of a burglary or to scare burglars away.
Tips for Choosing the Best sensors for Your Home Alarm System
A motion sensor is a key component of a business or home alarm system, so keep these tips in mind if you are planning to install such a system in your home or office.
- Though all motion detection sensors work on the same principle, not all of them offer the same functionality. Some sensors, such as those used to power automatic doors, are limited to detecting motion only from distances of less than 5 feet away, while some high-end sensors can detect motion taking place up to 50 feet away. Generally speaking, the greater the coverage provided by your sensor, the better the protection you will get.
- The viewing angle of the sensor is another important consideration. Sensors used in home burglar alarm systems should offer at least 90 degrees of horizontal coverage, and about 45 degrees of vertical coverage. Some higher-end motion detectors can detect motion within a 240 degree angle.
- The maximum range from which the sensor can communicate with the central console is critical as well. Some motion detectors can send an alert to a console that is located more than 400 feet away, while other sensors have a much shorter operating range.
In addition, there are several other issues that you need to consider when selecting a motion sensor. For instance, if you have pets in your house, you need to have a sensor that is intelligent enough to tell the difference between your pets’ movement and those caused by a person. Similarly, you need to decide whether you want battery-powered sensors or those that depend on electric power to operate.
By doing your research and selecting the right motion sensor for your situation, you can maximize the coverage provided by your burglar alarm system.