Leak Sensor Probe Dissection

Could a person not adhere or attach something that would make the sensor float as the water level increased, if this situation occured? Like a floaty for a kid. That would keep it from getting submerged. Another idea might be to glue a sponge to the bottom of the sensor. This way the water would leech up to the sensor but the sensor itself could be elevated above a predetermined level to also prevent a full submerge. The sponge of course could float I guess if it got deep enough.