Microwave detectors are used for detection of motion such as walking, running or crawling with the help of electro-magnetic radiation. All objects present on the earth emits infrared radiation or heat, it can be detected by electronic sensors, which are used in infrared cameras, and night vision goggles among others. Frequency of microwave ranges between 300 MHz to 300 GHz. Microwave infrared detectors are used to detect motion of an object with the help of infrared radiation. Microwave infrared detector works on one of two different methods, such as active detection and passive detection. Active detectors are also known as radar based motion sensor.

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In active detectors, the waves which are emitted by the detector are reflected back to the receiver, if there is an object present or moving in the room. The receiver, then analyzes these waves to determine the presence of objects. Consequently, if any object is present in the path, the detector triggers an alarm. Moreover, working of passive detectors is opposite to that of active detectors as they do not emit any infrared radiation, however they only detect the infrared radiation emitted to object across the area under consideration. Passive detectors are installed in a room or in an area to detect presence of an infrared heat emitted from living beings. When an object walks or moves into the detection area of passive detector, it detects the heat emitted by the object and an alarm is triggered.

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The major driving factor for growth of the global microwave infrared detectors market is the increasing use of microwave infrared detectors in various applications such as home security alarm system, office, automatic doors in commercial buildings, indoor lighting system, obstacle detection radar, and other areas of use. In home security alarm system, microwave infrared detectors are used for surveillance. As microwaves can penetrate through walls, microwave infrared detectors cover large area for home as well as commercial building for surveillance. These detectors can be programmed in such a way that the amount of false alarms can be minimized without reducing the amount of correct or positive detections.

As a result of these factors, microwave infrared detector market is expected to show significant growth in coming years. Moreover, in automobiles, these detectors are used in obstacle detection radar, front long and short range radar to avoid collision. Additionally, in industrial and commercial applications, such as building automation, traffic monitoring, and security systems microwave infrared detectors are used owing to their high accuracy. Considering these factors, demand for microwave infrared detectors is anticipated to show prominent growth during forecast period. However, microwave infrared detectors exhibit  number of false alarms, also the detectors consumes significant amount of power continuously, so their operational cost is anticipated to be high, which is expected to be major restraining factor to the growth of microwave infrared detector market.