The cause of tension in tensiometers
The problem with most tensiometers is that they don’t stand up to year after year of harsh weather conditions like frost. Plus, you’re constantly pulling the tensiometer up to check the water level, which can be especially frustrating during long-term studies.
The search is over
Introducing the T4 Tensiometer. The T4 is one of our bestselling tensiometers because it’s robust, precise, and easy to use, all at the same time. More usable than other tensiometers, it provides superior quality water potential data and remains one of the most reliable instruments in the world for year-round outdoor monitoring. Plus, the T4’s external refilling tube and simple installation save you an incredible amount of time and effort. On top of all that, the tensiometer is highly responsive. It reacts much faster to changing soil conditions than lower-quality tensiometers, enabling you to measure even the most minute changes in soil water potential.
It’s not immortal, but almost
Specifically designed for field use, the T4 ceramic and shaft are engineered to be virtually indestructible when it comes to harsh weather. The combination of this unbreakable and frost-resistant special ceramic and the new, impact-resistant shaft make the T4 a tensiometer you can rely on year after year in every season. And the T4 Tensiometer has a high accuracy of ±0.5 kPa, giving you peace of mind.
No removal? No problem.
We’ve outfitted the T4 with an external refilling tube. No more pulling the tensiometer out of the ground. When it’s time to refill, the T4 can be filled externally without ever having to remove it, saving you considerable time and hassle.
To save you even more time and effort, the T4 comes with a perfectly-sized auger to ensure as little soil disturbance as possible. For spot measurements in the field, just auger a hole and insert the tensiometer. It’s that easy. For long-term measurement, the T4 connects to the Infield 7 or any Campbell Scientific data logger.
A tensiometer for all seasons
At METER, we know soil tensiometers. We’ve sold over 10,000 across the span of a quarter century, so we’re confident that if you need a precise, easy, and reliable field tensiometer with outstanding year-round performance, you can rely on the T4. Its robust, frost-resistant design will never leave you in the cold.
- Reliable outdoor tensiometer
- UV-resistant, durable shaft material
- Seals and screw connectors are watertight according to IP 68
- Solid construction
- Year-round operation when installed deeper than 30 cm
- T4e can be refilled or emptied without removing it from the soil
High-strength special ceramic with homogeneous porosity
Temperature-compensated, typical shift 0.5% FS over 20K
Various lengths available (standard 300 mm)
100 kPa = -100 ± 3 mV
Soil water tension, transmitted via ceramic cup into the tensiometer, onto the water and pressure transducer, giving a continuous analog signal
Asymm. Wheatstone full bridge
10.6 VDC (5 - 15 VDC), stabilized
+100 to -85 kPa
± 0.5 kPa
~1.3 mA (at 10.6 V)
|Data logger compatibility|
Campbell Scientific, Infield 7
1.5 m: 4-pin plug M12
METER uses UV-resistant, durable materials for long-term field studies. Seals and screw connectors are watertight according to IP68.
California requires the following notice:
⚠️ WARNING: This product may contain chemicals including ethylene glycol, lead, nickel, styrene and cadmium, which are known to the State of California to cause cancer, birth defects or other reproductive harm. For more information, go to www.P65Warnings.ca.gov
Have a question? Our team is ready to help!
We manufacture, test, calibrate, and repair every instrument in-house. Our scientists and technicians use the instruments every day in our product testing lab. No matter what your question is, we have someone who can help you answer it.
Phone Europe: +49 89 12 66 52 0