Limiting remote sensor's angle of sensitivity?

I'm trying to catch a vandal on video. I've set up a camera, and I'm using X10's motion sensor (MS14A) as the trigger for the VCR.

My problem is that the MS14A has a fairly wide angle of sensitivity, and if I aim the sensor at the area where I expect the perp to be, I'll catch every passing car in the neighborhood.

Is there a way to constrict the angle within which this sensor detects motion?


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Yes, use standard black electrical tape to cover up the sensor.

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I put the sensor inside a tube, point the tube to the area I want to protect, and adjust location of the sensor inside the tube for angle of sensitivity.

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