Timeline for A few questions on PIRs and other motion detectors
Current License: CC BY-SA 4.0
15 events
| when toggle format | what | by | license | comment | |
|---|---|---|---|---|---|
| Jun 16, 2021 at 8:32 | comment | added | questioner | @Ardian So make a picture frame with two or three insulations on the glass. Also, do not stand outside where it is freezing cold compared to a warm house which makes changes I'm detection easier. | |
| Jun 15, 2021 at 4:24 | comment | added | Adrian McCarthy | @questioner: It was absolutely a PIR detector (in fact, it still is). Yes, modern window glass does reflect much of the energy in the IR range back outside, but it's not an absolute filter. (And picture frame glass, as posited in the question, isn't much of a filter at all.) When we complained to the alarm company about the false alarms, they didn't believe us either, until we demonstrated it with a human outside the glass door on a cold morning. | |
| Jun 13, 2021 at 22:15 | comment | added | questioner | @AdrianMcCarthy The motion sensor is based on passive infrared detection, therefore it works through clear glass. ... Most modern-day glass used in housing is 2 or 3 pane insulated glass and the necessary infrared heat detection will not pass through it. | |
| Jun 13, 2021 at 22:10 | comment | added | questioner | @AdrianMcCarthy Then it was not a PIR, it was likely an indoor microwave detector which can pass right through glass. | |
| Jun 13, 2021 at 15:08 | comment | added | Adrian McCarthy | I'm pretty sure glass is not a reliable way to attenuate the IR. I once had a false alarm from a PIR in a room when a deer wandering in the yard came right up to the double pane glass door at the far end of the room. | |
| Jun 13, 2021 at 10:38 | comment | added | Mast | 1: yes, the security industry has many types of sensors to pick from. Always use the right sensor for the right location, or you'll get people opening doors from the wrong side with a vaping pen. | |
| Jun 13, 2021 at 7:33 | answer | added | abligh | timeline score: 3 | |
| Jun 13, 2021 at 6:00 | history | tweeted | twitter.com/StackElectronix/status/1403955292518375430 | ||
| Jun 13, 2021 at 4:37 | answer | added | uhoh | timeline score: 2 | |
| Jun 13, 2021 at 3:55 | history | became hot network question | |||
| Jun 12, 2021 at 22:49 | answer | added | Passerby | timeline score: 3 | |
| Jun 12, 2021 at 21:24 | answer | added | jcaron | timeline score: 8 | |
| Jun 12, 2021 at 17:28 | answer | added | D.A.S. | timeline score: 4 | |
| Jun 12, 2021 at 16:45 | answer | added | DKNguyen | timeline score: 3 | |
| Jun 12, 2021 at 16:25 | history | asked | questioner | CC BY-SA 4.0 |