When people or other things get into and damage the regular state, some motion sensors will alarm as set. There are other sensors which are setting to alarm when people or things come back to the original state.
Usually, motion Sensors are put in relatively easy access to buildings, such as windows and gates, they are used to trigger alarms and in some cases they are automatic lighting switches. In all, motion sensor is an important part in security systems around the world.
PIR Sensor is just one of the technological techniques to identify motions, and that is why we will state PIR Sensor is only a subpart of Motion Sensors. The unique advantages have made PIR sensors more popular. For example, they are smaller in size, cheaper in price, low-power and very easy working principles, etc.
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For the convenience of beginners, the word“motion" are often added in its name. Thus, sometimes, the full name becomes“PIR Motion Sensor”.
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