DE-Sensitizing the MS-20?

LAKOTA

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Is it possible to "De-sensitize" the MS-20 to keep the PIR from tripping out at 40 feet or further?

That would cut down on blank pictures being taken of animals that are too far away from the camera to be seen at night.
 



tomtruck

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hi, i have moved the fresnal lense farther away from the pir, that reduced the distance that it it would pick up. hope it works..Tom
 

kmitch

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I've done the same as tomtruck. If you can mount the PIR so that the distance can be adjusted the sensitivity can be "tuned" for your conditions. For example during the summer when the air temp is close to body temp, you want to improve the sensitivity. During the cold months you want to reduce the sensitivity. I mounted my PIR board on some long machine screws with multiple nuts.

I understand there is some material available from a company called FresnelTech that changes the IR transmission properties of the lens.

Keith
 

ArkansasElkHunter

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Do  a search on MS20 Sensitivity.  I did some tests on distance vs sensitivity.  There is some good discussion in that post.  
 

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