Always put a hole in the bottom

Note that this is not our air quality sensor. This is a nuclear warhead. Almost as complicated….

Had a great meeting with John today about the Air Quality sensors that we are going to fit on lampposts around the city. He had a couple of pieces of very sensible advice.

• don’t make holes in the top where the water can get in

• make a hole in the bottom where water that gets in can drain out