Not sure if the PIR sensors shot out a beam or not, but it would need to shoot a beam that could be adjusted a bit for each individual application, (such as turning the outer beam a few degrees either way). The main thing is that if an object passed through this series of parallel beams approximately 30 inches wide, it would trigger a light indicating the object passed through the beams. The distance that the wireless would need to work should be 100-150 feet should be adequate. The place where the sensor bar would be placed would be difficult to access regularly, so it would be nice to include a battery pack that could be replace periodically.