Liquid level switch with normally open contact
Depending on the sensor type liquid level sensors can be either always submerged or always dry. They don't usually sense wetness or dryness. A sump pump level sensor has a switch that closes when the liquid rises above some level and remains closed until the liquid falls a certain amount below that level. The same sensor may have a second switch that closes when the liquid rises at an "alarm" level.

I agree that "normally" is usually the condition when the system is dry or de-energied.