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Pir Motion
Posted by AdminFire on August 27th, 2005
PIR motion sensors do not work through Windows?
If I mount a PIR (passive infrared) motion sensor behind a window, going to pick movement on the other side of the window?
Two ways to answer your question. 1. A more theoretical approach. A. Finding a spectral response curve PIR sensor. I've looked on the web and only found this: http://www.murata.com/products/catalog/pdf/s21e.pdf (graph on top of the page 9). It seems that the spectral response of the instrument is governed by that of a filter. b. Finding a spectral response curve of the glass. This will depend on the formulation of the cup. C. If there a band in the spectrum where both the PIR sensor glass and both have a good response (ie glass can support electromagnetic waves at a certain frequency and PIR sensor can detect), then the PIR sensor will work through glass. But my hunch is that the typical window glass block infrared frequency heat. 2. A. experimental approach Take a piece of glass and a PIR sensor. See if you can detect through glass.
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Leviton ODS10-ID Decora 120/277-Volt Wall Switch Occupancy Sensor, White $42.99 The Leviton ODS10-ID Decora wall switch occupancy sensor is the ideal energy-saving choice to provide automatic (auto on/off and manual on/auto off) lighting control in a variety of commercial and residential applications, including offices, conference rooms, multimedia rooms, child-care centers, and more. The ODS10 is the perfect solution for controlling a wide variety of load types. It features … |
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Q Fiber Infrared Heat Therapy Wrist Wrap – Q Fiber Infrared Heat Therapy Wrist Wrap – QFIBERWWQFIBERWW $22.00 Q Fiber Infrared Heat Therapy Wrist Wrap… |
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