VAPOR SORPTION ANALYZER
Applications: Moisture Release Curves
Automatic Static & Dynamic Soil Water Characteristic Curves
The Vapor Sorption Analyzer (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.
- Rapid Soil Water Characteristic Curve generation.
- Fast expansive soil characterization.
|WATER POTENTIAL RANGE||-10 to -475 MPa|
±1 MPa, or ± 1%
|ISOTHERM METHODS||Dynamic Dew Point 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||± 0.1 mg|
15° to 60°C (sample chamber temperature,sample temperature is measured separately, and may vary)
15° to 40°C
110 V to 220 V AC 50/60Hz
W 25.4 cm (10 in) x L 38.1 cm (15 in) x H 30.5 cm (12 in)
12.7 kg (28 lbs)
Disposable Sample Cups
15 ml disposable sample cups come in lots of 100 or 150. Tight seal prevents changes in water activity as the sample is stored or comes to equilibrium.
Stainless Steel Sample Cup
Ideal for use with drying ovens. Set of 10.
Safety Data Sheets
- Effects of Sample Disturbance on Soil Water Potential Measurements
- Isotherm Analysis: New (and Old) Ways to Look at Soil
Software & Downloads
- Water Potential 101 - Making Use of an Important Tool
- Water Potential 201 - Choosing the Right Instrument
- Water Potential 301 - Pushing Your Instruments Past Their Specifications
- Soil Moisture 101: Best Practices of Soil Moisture Measurements
- Soil Moisture 201: Water Content Measurement Theory & Application
- Soil Moisture 301: Why Your Soil Moisture Sensor May Read Negative