VSA Vapor Sorption Analyzer
Create Static and Dynamic Soil Water Characteristic Curves Automatically.
The Vapour Sorption Analyser (VSA) brings click-and-read efficiency to soil water characteristic curves (SWCC). In 24 to 48 hours, the VSA generates curves with up to 200 data points (water potential vs. water content) for both adsorption and desorption.
The VSA works in the dry (-10 to -475 MPa) range. You can create automated soil water characteristic curves and generate all the correlations with clay activity, surface area, and swelling potential.
With the new static feature, you can hold humidity constant and look at the way soil takes up water into its crystal structure (2:1 clays) and monitor water content change over time.
Benefits
– Rapid Soil Water Characteristic Curve generation.
– Fast expansive soil characterisation.
The AquaLab Vapour Sorption Analyser (VSA) is an automatic isotherm generator from the world leaders in water activity measurement. The VSA is the only automatic isotherm generator that can generate isotherms using both the Dynamic Vapour Sorption (DVS) method, which generates equilibrium isotherms, and the Dynamic Dewpoint Isotherm (DDI) method, which generates dynamic isotherms. By combing both methods in one instrument, the VSA makes it possible to investigate both dynamic matrix changes due to water sorption and the kinetics of those changes.
VAPOUR SORPTION ANALYSER
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| WATER POTENTIAL RANGE | -10 to -475 MPa |
| ACCURACY | ±1 MPa, or ± 1% |
| ISOTHERM METHODS | Dynamic Dewpoint Isotherm (DDI) & Static (DVS) |
| EXTERNAL GAS | Not needed. If external gas is used, no more than 7 PSI. |
| WATER RESERVOIR | 20 mL |
| SAMPLE WEIGHT RANGE | 500-5000 mg |
| SAMPLE CUP VOLUME | 10 cc |
| WEIGHT ACCURACY | ± 0.1mg |
| TEMPERATURE CONTROL RANGE | 15° to 60°C (sample chamber temperature, sample temperature is measured separately, and may vary) |
| TEMPERATURE OPERATING RANGE | 15° to 40°C |
| HUMIDITY OPERATING RANGE | 10-90% non-condensing |
| COMPUTER INTERFACE | USB |
| UNIVERSAL POWER | 110 V to 220 V AC. 50/60Hz |
| DIMENSIONS | Width: 25.4 cm (10 in) x Length: 38.1 cm (15 in) x Height: 30.5 cm (12 in) |
| WEIGHT | 12.7 kg (28 lbs) |