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Sensitive Sensors


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Ian Topham's picture
Ian Topham
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Joined: 22 Jul 2008

This is old story I found trawling the net but one that shows a good natural explanation is not always hard to find.

http://www.sensorsmag.com/sensors/AEC/NJ-Newspaper-Busts-Ghost/ArticleStandard/Article/detail/335342

Mysteryshopper
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Joined: 15 Oct 2008
"... overly sensitive IR

"... overly sensitive IR sensors, recently installed to control lights, are being triggered when the climate-control system causes air currents to shift ..."

Well it would be if air currents affected infra-red sensors.

Ian Topham's picture
Ian Topham
User offline. Last seen 7 hours 8 min ago. Offline
Joined: 22 Jul 2008
Good point Mysteryshopper

Good point Mysteryshopper :)  I wonder if they had some other kind of sensors inplace here as well then.

Mauro
User offline. Last seen 2 years 26 weeks ago. Offline
Joined: 15 Oct 2008
The only way a climate

The only way a climate control system could affect passive IR detectors would be if a sensor were placed right next to a hot air vent. True, air currents do not affect sensors themselves but enough hot air blown onto the plastic casing could fool the sensor. Guess why I know that.

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"Louhi spoke in riddled tones of three things to achieve: find and catch the Devil's Moose and bring it here to me. Seize the Stallion born of Fire, harness the Golden Horse. He captured and bound the Moose, he tamed the Golden Horse. Still there remained one final task: hunt for the Bird from the Stream of Death"

-Kalevala, Rune XIII-




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