To refill, or not to refill? That is the question.
The truth about tensiometers is that they’re hard to integrate into complex sensor networks, and they can be damaged or destroyed by bad weather. Plus, they need to be refilled, which means constantly pulling the tensiometer out of the soil to check the water level. Tensiometers simply haven’t been a practical part of a modern sensor network. Until now.
With the T8 Tensiometer, our goal was to design an instrument that was easy to use, reliable, and practically bulletproof when it comes to harsh weather. Not only that, an external refilling tube and plug and play capability make this the first tensiometer that works well in a large sensor network.
Master of the quick change–even under pressure
The highly-responsive T8 reacts much faster to changing soil conditions because of its small water volume, enabling you to measure even the most minute changes in water potential—something lower-quality tensiometers cannot do. It measures matric potential in the wet range, where most water movement occurs, enabling you to predict whether water will move and where it will go. In addition, the T8 still functions under positive pressure, meaning when the ground becomes saturated, it measures how high the water level is above saturation, important for understanding slope stability.
A refill gauge that’s always on the level
We’ve outfitted the T8 with an external refilling tube. No more pulling the tensiometer out of the ground. When it’s time to refill, the T8 can be filled externally without ever having to remove it, saving you an incredible amount of time and hassle. Not only that, a water level indicator lets you know when it’s time to refill, so you never have to guess if your water potential data are valid.
Never leaves you in the cold
Engineered specifically for long-term, year-round use, the T8 is extremely robust, frost-proof, and reliable. It offers an integrated temperature sensor, as well as lightning protection. Thanks to its solid construction and impact-resistant plastic, the T8 Tensiometer is unaffected by tough, year-round use in the field.
It’s as easy as plug and play
To save you even more time, the T8 is incredibly easy to install. Not only is it plug and play with METER data loggers, but its digital sensor interfaces with SDI-12 and RS485 and is easily integrated into large sensor networks, even those operated by a single data logger.
Uncompromising, peerless design for long-term measurement
Reliability. Versatility. Ease-of-use. Precision. Over 25 years of German engineering has made the T8 Tensiometer into one of the most accurate, robust tensiometers in its class, saving you time and hassle and making your life much easier.
- Reliable outdoor tensiometer
- Water level indicator
- Integrated external refilling
- Integrated temperature sensor
- 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
- Shaft and cable lengths free configurable
- Plug and play with METER data loggers
- SDI-12 compatible
High-strength special ceramic with homogeneous porosity
Various lengths available (standard 200 mm)
Soil water tension: ± 0.5 kPa
|Output signal analog|
Selectable ranges: 2 x 0 ... 1 V / 2 V / 5 V
|Output signal digital|
RS485 tensioLINK, SDI-12
|Measuring range soil water tension|
+100 to -85 kPa
Shaft water protection cover, calibration certificate, refilling syringe, user manual
|Measuring range temperature|
-30 to 70 °C
6 to 20 VDC
|Data logger compatibility|
METER ZL6, EM50/60 series, Campbell Scientific, Infield 7
1.5 m; 8-pin plug M12; pigtail adapter available for connection with CSI dataloggers
METER uses UV-resistant, durable materials for long-term field studies. Seals and screw connectors are watertight according to IP 68
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 or problem? Our support team can 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