What happens if I lose or break my Propeller sensors? Mandy 31 July 2017 21:47 Updated Follow Not to worry. Simply call or email us so we can get you what you need. Related articles I have changed medications. How do I get a new sensor? What do I do with my old sensor? How to Remove Your Sensor for MDI How to Attach Your Sensor for Diskus How does the hub work? How do I know if my sensor has stopped working? Comments 0 comments Please sign in to leave a comment.