PIVOT sensors are water-resistant but not waterproof. There's a very large chance that if you immerse them in water, even momentarily, they will malfunction.
If this happens to you, wipe the sensor off with a towel, then place it, submerged, into a bowl of dry rice for about a day. The rice just may wick some of the remaining moisture out of the sensor. Then attempt to restart the sensor. If it continues to malfunction, you'll need to contact us for a replacement.