Are biosensors waterproof or water resistant? The Lingo biosensor is water resistant and will withstand being worn in water up to depths of 3 feet for up to 30 minutes. You can bathe, shower, and swim while wearing your biosensor. Related articles How long can I wear a biosensor? Why does my new biosensor give higher or lower glucose readings than my previous biosensor? Why do I see spikes overnight? / Why do I wake up with Lingo Count? Can I wear my biosensor during airport security checks? Does applying a biosensor hurt?