tensiometer
/ˌtɛnsiˈɑmɪtər/
noun
- An instrument that measures the tension or surface tension of a liquid, or the moisture tension in soil.
- Farmers use a tensiometer to check soil moisture and decide when to water crops.
- The scientist used a tensiometer to measure the surface tension of the soap solution.
- A tensiometer can help prevent overwatering by showing how dry the soil really is.