Item No. LEW292
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Dial soil tensiometer with a porous ceramic tip, in lengths from 15 to 120 cm, for timing irrigation at root depth.
Overview
A soil tensiometer gives a direct measure of the tension at which water is held in the soil, which is the suction plant roots must exert to extract it. That makes it a practical guide to when to irrigate, for research and for everyday farm use.
The instrument is a water-filled tube, sealed at one end, with a porous ceramic filter at the other. Buried in soil, the filter lets water pass freely but not air. It includes a reservoir, an air-free gauge chamber and a hermetically sealed dial vacuum gauge with a dual scale, for general use with row, tree and field crops.
Standard lengths are 15, 30, 45, 60, 90 and 120 cm. A digital soil moisture tension meter is also available.
Key features
How it works
Fill the tube with water and set the ceramic tip in the soil at root depth.
As the soil dries, it pulls water out through the ceramic tip and tension builds in the tube.
The dial shows the soil moisture tension, which tells you when to irrigate.
Key specifications
| Parameter | Value |
|---|---|
| Standard lengths | 15, 30, 45, 60, 90 and 120 cm |
| Gauge | Hermetically sealed dial vacuum gauge |
| Scale (millibars) | -1000 to 0 |
| Scale (mm Hg) | -760 to 0 |
| Tip | Porous ceramic |
| Use | Row, tree and field crops |
★ also shown at the top of the page.
FAQ
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