Most sensors, infra red, microwave and ultrasonic seem to trigger for no apparent reason. I've tried them all back in the past. Maybe the tech is better now, but these things that detect movement all have their drawbacks. Brian
Most sensors, infra red, microwave and ultrasonic seem to trigger for no apparent reason. I've tried them all back in the past. Maybe the tech is better now, but these things that detect movement all have their drawbacks. Brian
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