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2. Passive infrared sensor - Wikipedia

   en.wikipedia.org/wiki/Passive_infrared_sensor

   PIR sensors are commonly used in security alarms and automatic lighting applications. PIR sensors detect general movement, but do not give information on who or what moved. For that purpose, an imaging IR sensor is required. PIR sensors are commonly called simply "PIR", or sometimes "PID", for "passive infrared detector".

3. Occupancy sensor - Wikipedia

   en.wikipedia.org/wiki/Occupancy_sensor

   Occupancy sensor types include: PIR sensors, which work on heat difference detection, measuring infrared radiation.Inside the device is a pyroelectric sensor which can detect the sudden presence of objects (such as humans) who radiate a temperature different from the temperature of the background, such as the room temperature of a wall.

4. Depot Protection System - Wikipedia

   en.wikipedia.org/wiki/Depot_Protection_System

   A Depot Protection System (DPS) is a system designed to protect staff and equipment by ensuring the safe and controlled movement of rail vehicles into and out of train maintenance depots, a process sometimes known as train movements or shunting. This allows train maintenance operations to be conducted without endangering the safety of staff ...

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   On Dec. 2, 2023, deputies responded to a distress call at a home in West End, N.C., where they found the toddler dead. Investigators believe the child was exposed to “elevated temperatures ...

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   From the outset, correcting an iron deficiency may seem small, but it can make a world of a difference in helping you feel empowered and in control of your health. Restoring iron to your body can ...