Timeline for A few questions on PIRs and other motion detectors
Current License: CC BY-SA 4.0
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| Jun 13, 2021 at 22:11 | comment | added | questioner | They are called presence detectors and motion detectors: ivoryegg.co.uk/product_guides/… | |
| Jun 13, 2021 at 15:17 | history | edited | jcaron | CC BY-SA 4.0 |
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| Jun 13, 2021 at 12:56 | history | edited | jcaron | CC BY-SA 4.0 |
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| Jun 12, 2021 at 23:28 | history | edited | jcaron | CC BY-SA 4.0 |
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| Jun 12, 2021 at 22:46 | comment | added | jcaron | @questioner Most if not all lack one or more of the pros of PIRs. More expensive, more difficult to set up (requires calibration or requires multiple devices), can't run on battery (needs wiring), yields false positives, narrow field of view (sometimes just a line)... There are plenty of commercial alarms that use other systems, including door/window opening detection systems, vibration detection, and more... | |
| Jun 12, 2021 at 22:40 | comment | added | questioner | I am just confused as to why I never see these in commercial alarms. | |
| Jun 12, 2021 at 21:24 | history | answered | jcaron | CC BY-SA 4.0 |