T5 Laboratory Tensiometer
- Measurements:
Small and Fast
With an active surface of only 0.5 cm2 and a diameter of 5 mm the ceramic tip has all advantages of small dimensions: little soil disturbance, punctual pick-up and fast response.
Extended Range
The special version T5x can achieve a measuring range of 200 kPa.
The T5 can be installed in any position and orientation. Bubbles are easily detectable through the transparent shaft. Output signals are balanced.
Typical Applications
- Punctual measurement of water potential
- Miniature lysimeter studies, together with micro samplers and soil temperature probes
- Determination of pF/wc and K/Psi in soil columns, soil cores or soil sampling rings
- Determination of leachate and capillary water movements
- Controlling irrigation
- Nursery experiments
- Measurements in the upper soil horizons in the field
- Monitoring with data loggers
- Spot your readings in with the INFIELD7
Advantages
- Accurate zero-tension reading
- Fast response: With sufficient filling, the T5 responds within 5 seconds to an applied air pressure change of 0 to 85 kPa
- Most standard T5's reach a range of at least 150 kPa when delivered.
Limitations
- Not for dry soils
- Not frost resistant
- In-field applications require impact protection
See how to refill a T5 Tensiometer from UMS
Specifications
Part number 45300
| Total Length |
4 mm + |
|---|---|
| Current Consumption |
~1.3 mA (at 10.6 V) |
| Shaft with Cup |
Various lengths available (standard 70 mm) **Please indicate shaft/cup length on your order!** |
| Power Supply |
10.6 VDC (5 - 15 VDC), stabilized |
| Diameter |
5 mm |
| Electronic Principle |
Asymm. Wheatstone full bridge |
| Shaft Material |
acrylglass |
| Sensor | Piezoresistive pressure transducer max. overpressure ± 3000 hPa |
| Corpus Diameter |
20 mm |
| Stability |
Typical shift < 0.5% p.a. |
| Cable |
Various lengths available (standard 5 m) **Please indicate cable length on your order!** |
| Temperature Shift | Temperature-compensated, typical shift 0.5% FS over 25 K |
| Range | -1000 to 0 to 850 hPa (ca. pF 2.9) minus shaft/cup length: 1 cm = 1 hPa |
| Accuracy | + 0.5 kPa |
| Impedance | ~2.5 kOhm |
| Signal |
-1000 hPa = -100 ± 3 mV |
| Measurement Principle | Soil water tension, transmitted via ceramic cup into the tensiometer, onto the water and pressure transducer, producing a continuous analog signal. |
Comparisons
| T5 Tensiometer Comparisons |
|---|
| Lab based pot or coil columns experiments where point measurements are necessary. |
| Must be protected from Frost |
| An active surface of 0.5 cm2 |
| Ceramic diameter of 5 mm |
| Small soil disturbance |
| Acrylic Shaft diameter 5 mm |
| Acrylic shaft length customizeable 2 - 20 cm |
| Porous ceramic diameter 5 mm |
| Ceramic active surface 0.5 cm2 |
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.
T5 Refill Kit & Tool Set
The T5 Refill kit & tool set includes refill equipment needed to properly refill your T5 tensiometer. It also inlcudes an Auger kit and connecting cable for Campbell Scientific Dataloggers.
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