Are biosensors waterproof? Yes, they can be worn in water. Our biosensors can withstand depths of 1 metre for up to 30 minutes. So casual bathing, showering and swimming are fine, but not diving. Related to Wear Related articles How long can I wear a biosensor? Can I still use a biosensor after it expires? Does applying a biosensor hurt? What is a Lingo Count? How does my Lingo Count work?