What happens if I lose or break my Propeller sensors? Mandy September 25, 2019 01:27 Updated Follow Not to worry. Simply call or email us so we can get you what you need. Related articles I changed medications. How do I get a new sensor? What do I do with my old sensor? MDI Sensor Technique How do I know if my sensor stopped working? What is a sponsor? How to Attach Your Sensor for MDI with White Button Comments 0 comments Please sign in to leave a comment.