Can I still use a biosensor after it expires? September 05, 2024 09:22 Updated No - Expired biosensors may not give accurate readings. Please apply a new biosensor. Related articles Can I re-use a biosensor? What Bluetooth radio frequency does my biosensor use? What battery is in my biosensor? Why does my new biosensor give higher or lower glucose readings than my previous biosensor? What if my biosensor stops working or falls off