What is a passive infrared sensor (PIR)?
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A Passive InfraRed (PIR) sensor is an electronic device that measures infrared light radiating from objects in its field of view. PIR sensors are often used in the construction of PIR-based motion detectors. Apparent motion is detected when an infrared source with one temperature, such as a human, passes in front of an infrared source with another temperature, such as a wall. PIR sensors may also be used in remote thermometers. A PIR thermometer device is able to measure changes in IR emission that correspond to temperature changes, but the actual temperature values cannot be calculated. |
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| Date | Title | Blog | Views | comment number |
| 2011-06-16 |
An autonomous wireless sensor network for space applications
( wireless ) |
fairly's BLOG | 1421 | 3 |
| 2011-06-14 |
Wireless sensor networks & the outlook for deterministic Internet
( wireless sensor networks sensor ipv6 ) |
The Cole /bin | 6388 | 2 |
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