Tensiometers
Tensiometer to measure matric water potential
Tensiometers measure the force that plant exerts to extract water from the soil. Referred to as soil suction, tension, or water potential, the measurement indicates the amount of energy plants exert to extract and use water from the soil.
A tensiometer comprises:
- a porous ceramic cup,
- a plastic body tube,
- a dial gauge (manual tensiometer) or a digital transducer (logging or IoT tensiometer)
Both the manual and digital transducer tensiometers use the Soil Moisture Equipment TS25 Jetfill Tensiometer as the basis for the system.
The soil water tension is transmitted via the ceramic cup into the tensiometer. The vacuum inside the tensiometer is measured by a dial gauge or digital transducer (which gives a continuous analogue output signal) for data logging or Internet of Things connectivity.
The Jetfill Tensiometer features the Jetfill reservoir for push-button convenience and minimisation of soil disturbance during service. The modular construction allows for easy replacement of the porous ceramic cup, dial gauge/transducer, or addition of extensions for flexibility and variety in use.
Jetfill Tensiometers are available in lengths from 15 cm (6”) to 91 cm (36”), supplied as standard with a 1 bar gauge or an optional ½ bar gauge. The gauge can be substituted for a transducers for IoT or datalogging applications. The full range of Jetfill Tensiometers are found in the specifications tab.
Internet of Things and Jetfill Tensiometers
Jetfill tensiometers can be used with the GT3-15 Transducer or a Trafag Transducer, depending on IoT Node.
The tensiometer SNiP-MPS integrates 1x MFR-NODE and 1x GT3-15 Transducer coupled to preferred Jetfill Tensiometer. The MFR-NODE can support up to 3x GT3-15 Transducers to monitor soil water potential at multiple depths.
Dataloggers and Jetfill Tensiometers
ICT International can supply the Jetfill Tensiometer with a pressure transducer that is suitable for connection to a data logger for long term data collection and storage.
All Jetfill Tensiometers are 22mm/0.875inch diameter, and available with a 1 bar dial gauge as standard, or a 1/2 bar dial gauge (L suffix in the part number)
- TS25-L6 (Old part number: 2725ARL06): 150mm/6″ Installation Depth with 1 bar Dial Gauge
- TS25-L6L (Old part number: 2725ARL06-L): 150mm/6″ Installation Depth with 1/2 bar Dial Gauge
- TS25-L12 (Old part number: 2725ARL12): 300mm/12″ Installation Depth with 1 bar Dial Gauge
- TS25-L12L (Old part number: 2725ARL12-L): 300mm/12″ Installation Depth with 1/2 bar Dial Gauge
- TS25-L18 (Old part number: 2725ARL18): 450mm/18″ Installation Depth with 1 bar Dial Gauge
- TS25-L18L (Old part number: 2725ARL18-L): 450mm/18″ Installation Depth with 1/2 bar Dial Gauge
- TS25-L24 (Old part number: 2725ARL24): 600mm/24″ Installation Depth with 1 bar Dial Gauge
- TS25-L24L (Old part number: 2725ARL24-L): 600mm/24″ Installation Depth with 1/2 bar Dial Gauge
- TS25-L36 (Old part number: 2725ARL36): 900mm/36″ Installation Depth with 1 bar Dial Gauge
- TS25-L36L (Old part number: 2725ARL36-L): 900mm/36″ Installation Depth with 1/2 bar Dial Gauge
- G2.5T50 – (Old part number: Z2060FG6) Vacuum Dial Gauge, 2.5″ Dia., Recalibrator Style, Low Tension, 0-50 cbar
- 2034 – Water Additive, Blue, Algecide/Herbicide, 0.5 oz
- 2790K1 – TS25, Complete Service Kit (Vacuum hand pump with gauge, tubes, blue dye)
- 2725-Kit – TS25 Jetfill tensiometer replacement kit (jetfill reservoir, O-rings, ceramic cup)
- PM5 (Old part number: 2005G2): WS/TS, Vacuum Hand Pump with Gauge
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