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Tensiometers

  • Measurements:
    • Soil Suction,
    • Water Potential
  • Applications:
    • Water Balance Studies
  • Overview
  • Accessories
  • Support
  • Education

Tensiometers are by far the most accurate, precise and highest resolution instruments for measuring soil water potential in the wet end. UMS's line of tensiometers are engineered and produced with extreme tolerances, giving them the best performance characteristics of any tensiometers ever made.

Traditional tensiometers cavitate around -80 kPa. Fanatical attention to detail in design and manufacturing (along with a few mystical tricks of physics) have enabled UMS to build tensiometers that can go beyond -200 kPa.

 

Tensiometers-HERO.jpg

Accessories

Augers.jpg

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
Parts have threaded connection and can be extended with one or more 100 cm extension rods.

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

Infield7.jpg

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

T5-Refill-Kit.JPG

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.jpg

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

  • Measuring UMS Tensiometers with non-UMS Control and Data Acquisition Systems

Manuals

  • Manual - TS1
  • Manual - T8
  • Manual - T5
  • Manual - T4

Request Support

Email: support@decagon.com
Phone: 800-755-2751 or
509-332-2756
Fax: 509-332-5158

Education

Virtual Seminar

  • September 28, 2010: Virtual Seminar: Quick Methods for Determining Plant Available Water
  • July 27, 2010: Virtual Seminar: New Vadose Zone Monitoring Technology
  • September 20, 2012: Virtual Seminar: Water Potential 101 - Making Use of an Important Tool

Newsletters

  • Geoenvironmental Engineering Newsletter-2007
  • Soils News-2005

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Related Products or Services

  • MPS-1 Dielectric water potential sensor
  • HYPROP
  • MPS-2 Dielectric Water Potential
  • WP4C Dewpoint Potentiameter
T4-Tensiometer-HERO.jpg

T4 Field Tensiometer

Standard field tensiometer. Only the ceramic cup is filled with water to improve accuracy and offer year-round operation. Optionally with external refilling: The model T4e with external refilling can be refilled or emptied without removing it from the soil. » Learn more

T5-Tensiometer.jpg

T5 Laboratory Tensiometer

Quick-response mini-tensiometer for measuring water potential in small spaces like soil columns, potted plants, and laboratory water flow experiments. Can be used to make spot measurements in the field if care is used. » Learn more

T8-Tensiometer.jpg

T8 External Refilling Field Tensiometer

Field tensiometer's water level indicator tells you when to refill. Also measures temperature and has an external refilling option. » Learn more

TS1-Tensiometer.jpg

TS1 Smart Tensiometer

The world's first "smart tensiometer." Designed to be installed in the field and left alone. The TS1 logs water potential data, self-refills using soil moisture, monitors temperature, and self-empties when the temperature nears freezing to avoid damage. » Learn more

2365 NE Hopkins Court
Pullman, WA 99163 - USA
1-800-755-2751 / Int'l: 509-332-2756
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