Hi, if you are talking about overall height, i would not like to fit a pair of photocells at 200mm, at this height they would certainly be to low and the infra red would travel underneath most cars underside. We tend to fit photocells at a minimum of 500mm from the ground.
We also wire the exit loop into safety aswell, in series with the internal photocells.
Carl.
We also wire the exit loop into safety aswell, in series with the internal photocells.
Carl.