I have a pantry (and a couple of other small store rooms) where I intend putting in a flush mount sensor to automate lighting. Unfortunately if it is placed in the middle of the room it will possibly pick up movement as someone walks past the doorway (even with the filter to reduce the field of view). Apart from making sure the door is always shut(!) is there any reason not to locate the sensor just inside the door of the room in the ceiling so that the sensor pickup on the doorway side is blocked by the wall area above the door entrance, allowing only the area inside the room to be 'sensed'? Thanks Andrew