Hyprop Soil Moisture Release Curve Meter, Display Type : Digital

Complete Moisture Characteristics in 3-5 Days

HYPROP is a modular lab instrument that generates a moisture characteristic curve and determines the unsaturated hydraulic conductivity of soil samples in standard 250 ml soil sampling rings. After setup the system generates the moisture characteristic while running unattended.

Highly Accurate

Two precision mini-tensiometers measure water potential at different levels within the sample while the sample rests on a precision laboratory scale (2000 gram range; 0.01 gram resolution). As the sample dries, changes in water potential are correlated to changes in moisture content using the Wind/Schindler evaporation method.

Verified Results

Results are verified and values for dry range and saturation are calculated according to a selected model (i.e., van Genuchten/Mualem, Bimodal van Genuchten/Mualem, or Brooks and Corey.) Model parameters can be selected before, during, or after the measurement procedure.

Advantages

• Easy and flexible handling
• Usage of intact standard sampling rings without perforation
• Tensiometer shafts are installed into the sample from the bottom side
• Low expenditure of time and costs
• Suitable for mobile applications
• High-quality results for the water retention curve especially in the range close to saturation
• The hydraulic functions are consistently proved by numerous readings
• T5x Tensiometers may measure beyond 250 kPa due to boiling retardation
• The mathematical functions are profoundly adapted
• Simultaneous measurement of water retention curve and hydraulic conductivity
• Suitable for all soils (provided Tensiometers can be installed)
• No special requirements for the ambient conditions. Only the evaporation conditions should remain more or less constant during a measurement
• An existing scale with serial port can be connected to the system
• Extendable to up to 20 assemblies for one scale

Limitations

• The measuring range is limited to the measuring range of the Tensiometers
• Poor resolution of the hydraulic conductivity near saturation (particularly in sandy soils)