Individual Calibrated Before Shipment
TEROS 21 is more accurate than competitor sensors doesn't do it justice. Unlike competitor models, we calibrate each and every sensor for you. To do this, we use a chamber system that allows the TEROS 21 water potential sensor to come to a fixed water potential. We put sensors in silica flour, and by controlling the water potential, we're able to set calibration points from -10 kPa to -80 kPa. The result: a long-term monitoring solution you can trust.
The TEROS 21 provides an even more accurate soil moisture picture than measuring water content alone. A water content sensor only shows the percentage of water in the soil, but add a TEROS 21 water potential sensor, and you'll know if that water is available to plants and where it will move. Plus, unlike water content, matric potential isn't dependent on soil type, so you can compare moisture between different sites.
- Improved accuracy comes from the six-point factory calibration
- No recalibration
- Low salt sensitivity
- Affordability
- Execellent range (sensitivity from 0 kPa all the way to air dry [-100,000 kPa])
- Onboard temperature measurement
- SDI-12 compatible
| Water Potential |
Range : 0 to - 100,000 kPa (1.70 to 6.00 pF) Resolution : 0 kPa Accuracy : ±(10% of reading + 2 kPa) from -100 to -5 kPa NOTE: TEROS 21 Gen 2 can read up to 0 kPa when on a wetting path. The air entry of the soil limites the performance of the sensor to 0 kPa on the drying curve. NOTE: TEROS 21 is not well calibrated beyond -100 kPa. For more information on using the TEROS 21 beyond this range, see Section 3.3.3 in the user manual |
| Temperature |
Range : -40.00 to 60.00°C Resolution : 0.10°C Accuracy : ±1.00°C |
| Dielectric Measurement Frequency | 7 MHz |
| Signal Output | DDI serial or SDI-12 |
| Dimensions |
Length : 9.6cm Width : 3.5cm Height : 1.5cm Sensor Diameter : 3.2cm |
| Operating Temperature Range | -40.00 to +60 |
| Cable Length |
Standard : 5m Max. Length : 75m |
| Measurement Duration | 175ms |
| Compliance |
EM ISO/IEC 17050:2010 (CE Mark) EN 55011:2016 / A1:2017 (RCM Mark) |
