Alarm and Sensor Technologies: Difference between revisions
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====Sensors==== | ====Sensors==== | ||
* | *Passive Infrared (PIR) | ||
This type of sensor is used to protect inside and outside spaces by watching for changes in radiated IR. | This type of sensor is used to protect inside and outside spaces by watching for changes in radiated IR. | ||
**Does a good job of detecting any type of motion by warm bodies | **Does a good job of detecting any type of motion by warm bodies | ||
Revision as of 10:01, 13 May 2012
Overview of Alarm Technologies
Sensors
- Passive Infrared (PIR)
This type of sensor is used to protect inside and outside spaces by watching for changes in radiated IR.
- Does a good job of detecting any type of motion by warm bodies
- Inexpensive and widely available
- Is vulnerable to false-alarms or deliberate attempts to set it off
- Wikipedia article on PIRs
- EEVblog teardown of a PIR