[IceStorm]

Alan,
You are correct. I did mean sawtooth wave. I even read over the post twice and somehow missed that. The unit we are using is a halleffect sensor that can sense the poles of the magnet moving. I can't remember the company that makes them at the moment or where the datasheets can be found they are all printed out at the shop where we don't have any working internet connection.

your idea of sampling the values and comparing them is kinda what I had in my mind that we needed to do, I'm just not sure how to nudge are team members in that direction with the code.

Thanks