Tensiometers are by far the most accurate, precise and highest resolution instruments for measuring soil water potential in the wet end. UMS's line of tensiometers are engineered and produced with extreme tolerances, giving them the best performance characteristics of any tensiometers ever made.
Traditional tensiometers cavitate around -80 kPa. Fanatical attention to detail in design and manufacturing (along with a few mystical tricks of physics) have enabled UMS to build tensiometers that can go beyond -200 kPa.
T4 Field Tensiometer
Standard field tensiometer. Only the ceramic cup is filled with water to improve accuracy and offer year-round operation. Optionally with external refilling: The model T4e with external refilling can be refilled or emptied without removing it from the soil.
T5 Laboratory Tensiometer
Quick-response mini-tensiometer for measuring water potential in small spaces like soil columns, potted plants, and laboratory water flow experiments. Can be used to make spot measurements in the field if care is used.
T8 External Refilling Field Tensiometer
Field tensiometer's water level indicator tells you when to refill. Also measures temperature and has an external refilling option.
TS1 Smart Tensiometer
The world's first 'smart tensiometer.' Designed to be installed in the field and left alone. The TS1 logs water potential data, self-refills using soil moisture, monitors temperature, and self-empties when the temperature nears freezing to avoid damage.