T8 External Refilling Field Tensiometer
- Measurements:
- Applications:
Long-Term Water Potential Monitoring
Developed for long-term monitoring applications, the T8 features a water level indicator that tells you when to refill and helps avoid caviation. Integrated external refilling means the T8 can be maintained without removing it from the soil. SDI-12 capability allows you to integrate the T8 into large sensor networks powered by a single data logger.
Typical Applications
- Field measurements
- Water balance, leaching, transport studies, model calibration
- Ecological impact studies
- Agricultural or forestal studies
- In-situ retention curves
- Data logger applications
- Spot readings in with the INFIELD7b
Advantages
- Integrated amplifier with configurable output signals
- Integrated soil temperature sensor
- Integrated fill level indicator
- Integrated external refilling: refill or empty the cup through capillary tubes without removing the T8 from the soil
- Solid construction
- Integrated datalogger function
- tensioLINK RS485 interface
- SDI-12 interface
Limitations
- Not for dry soils
Specifications
Part number 45400
| Ceramic Cup | High-strength special ceramic with homogeneous porosity Length: 60 mm Diameter: 24 mm |
|---|---|
| Temperature Shaft |
Various lengths available (standard 200 mm) Diameter: 25 mm Material: acrylglass 19/25 mm **Please indicate shaft length on your order!** |
| Accuracy | Soil water tension: ± 0.5 kPa Temperature: ± l0.2 K (-10 to 10°C), ± 0.5 K (-30 to 70°C) |
| Output signal analog | Selectable ranges: 2 x 0 ... 1 V / 2 V / 5 V |
| Output signal digital |
RS485 tensioLINK, SDI12 |
| Current Consumption |
7 mA |
| Measuring Range Soil Water Tension |
+1000 to 0 to -850 hPa |
| Delivery Contents |
Quartz clay powder, shaft water protection cover, calibration certificate, user manual |
| Measuring Range Temperature |
-30 to 70°C |
| Power Supply |
6 to 20 VDC |
| DATALOGGER COMPATIBILITY |
Campbell Scientific Loggers: CR10X, 21X, 23X, CR1000, CR3000, etc |
| Cable | 1.5 m; 8-pin plug M12; pigtail adapter available for connection with CSI dataloggers |
|
UMS uses UV-resistant, durable materials for long-term field studies. Seals and screw connectors are watertight according to IP 68. |
|
Comparisons
| Acrylic Shaft diameter | 25 mm |
|---|---|
| Acrylic Tube Length |
10 - 200 cm |
| Ceramic Cup diameter | 24 mm |
| Ceramic Cup Length |
60 mm |
Accessories
Auger Kits for Pore Water Samplers and Tensiometer
The cutting edge of the auger has a tapered tip similar to the shape of a Tensiometer or pore water sampler. Thus, the bore hole is large enough to insert the shaft, but the cup will have a tight and perfect fit to the soil.
The not recommendable slurrying of the cup with quartz clay can be avoided.
A divisible auger set includes:
- Cutting edge with tapered tip
- Handle with hammering head
Benefits
- Simplifies installation of shafts
- Avoids slurrying
- Multipart - divisible - extendable
| TB-20 | TB-25 | |
| Dimensions | ||
| Cutting Edge | 22 mm dia. x 50 cm | 26 mm dia. x 50 cm |
| Tip | 20 mm dia. x 5.6 cm |
24 mm dia. x 5.6 cm |
| Total length | 1.25 m |
1.5 m |
| for shafts with | 20 mm dia. | 24 mm dia. |
| Part no. | TB-20/125 | TB-25/150 |
| Extension rod Part no. | TBE-100 | |
Infield 7
The INFIELD7 is a multi-functional handheld read-out unit for all UMS tensiometers. Download readings to PC with accessory USB converter
Includes:
- Memory for 250 readings
- Vertical water column compensation for Tensiometers
- T8 and TS1 configuration
- Carrying case
- 4 AA batteries
Looking for a data logger for long-term installations? Contact Decagon support at 1-800-755-2751.
Lab Refill Kit for Tensiometers
Lab refill kit for tensiometers (includes T4 and T8), includes stand with clamps, adapter that fits sensor body, 500 mL bottle, pressure gauge, tubes, beaker, and refilling syringe.
Refill Kit for External Refillable Tensiometers
Refill kit for external refillable tensiometers (includes T4e and T8), includes hand-operated vacuum pump, 500 mL bottle, refill syringe, tubes and valves.t
TensioLINK USB converter
The tensioLINK USB converter is used for directly connecting sensors and devices with serial tensioLINK to a PC. One can configure features and read out measured data.
UMS devices with 8pin M12 connectors (e.g. TS1 or T8 tensiometers) could be directly connected to the converter without the need for a further power supply. The sensor is powered through the USB interface.
Use with the PC-Software tensioVIEW. Manual Software and Driver come along with supplied CD.
| Sensor Supply | 9 VDC / 100 mA tolerance +1 V |
| Short circuit | 2 Min. |
| Galvanic isolation | 1 kV |
| Serial sensor interface | RS485-2 wire, ESD protection 15 kV |
| USB interface | compliant to USB 1.1 und 2.0 |
Support
Troubleshooting Articles
Manuals
Request Support
Email: support@decagon.com
Phone: 800-755-2751 or
509-332-2756
Fax: 509-332-5158
Or send us an information request: