Streat Instruments Ltd. - a member of the Garnett Group
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- Equi-pf - Soil Analysis
Equi-pf - Soil Analysis
Equi-pf avoids all the difficulties associated with the traditional tension table technique while preserving the original tension table principles. By automating the inflow and outflow measurements and tension applied to the sample, Equi-pf: Significantly improves the accuracy and reliability of the measurements and data. Reduces sample disturbance as there is no repeat handling required. Considerably reduces labour hours and improves the efficiency of the operation.
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Benefits of using Equi-pf to determine the soil moisture release curve:
- Fully automated – the sample is put in place and no further operator intervention is required.
- No disturbance of the sample during tests.
- Programmable tension steps.
- Soil reaches equilibrium at each tension step.
- Each tension step has a user settable time limit to reach equilibrium.
- Weighing errors are eliminated – inflow and outflow water volume is measured directly, to an accuracy of 0.1 ml.
- Outflow and inflow curves, both cumulative and for the current tension are automatically updated and displayed on a graphical LCD.
- Each tension step can be manually bypassed.
- Allows multiple continuous drying and wetting cycles.
- Data on hysteresis in soils.
In addition to the measurement of the standard soil moisture release characteristic, Equi-pF can also be used to study other soil properties including:
- The effects of temperature on the moisture characteristics of soil
- Soil moisture characteristics of swelling soils under over-burden pressures
- The effect of reference point on moisture release properties
- Unsaturated hydraulic conductivity and diffusivity of soil near saturation
- The effect of sample height on moisture release curve properties
- Soil water storage hysteresis characteristics
- DNAPL contaminant analysis
- Analysis of air entrapment effects on moisture release
