Automated Thermal Dryout Curves


VARIOS generates thermal dryout curves automatically, so you can focus on other tasks. No manual process of getting the soil in and out of the oven. No repeated manual weighing of the sample. It's all taken care of for you, including data acquisition and analysis. How?

A photo of VARIOS automated thermal dryout curves laboratory instrument

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Thermal conductivity—simplified

Constructing a thermal dryout curve is a painstaking process with the potential for human error. Time and effort go into acquiring and setting up the right components, plus you spend hours mixing samples, taking measurements, and fitting the data into a curve. What if you could have something more accurate, more reliable—and more automated? You can. Introducing VARIOS.

METER is trusted by

University of Idaho
Brigham Young University
Temple University
Campbell Scientific

Get more done by getting automated. Remove the tedium and the human error out of thermal dryout curves with VARIOS. It automatically generates complete, high-resolution dry down curves with less effort and less cost, so you can focus on what you love.

A photo of VARIOS automated thermal dryout curves laboratory instrument

Engineered for accuracy

VARIOS was specifically designed to create thousands of thermal dryout curves for the 400 mile Suedlink underground cable installation in Germany. So it’s engineered to be accurate, affordable, and low maintenance. It combines legendary TEMPOS and HYPROP technology to measure thermal conductivity as a function of soil water content. And it’s easy. Just insert the needle into a saturated soil sample, and put it on the balance. VARIOS automatically makes hundreds of precision thermal conductivity measurements while the water evaporates from the sample. The mean water content is calculated based on a continuous recording of the sample weight change. Powerful software does all the calculations, visualization, and fitting automatically, reducing the possibility of error.

A photo of the probe for the VARIOS automated thermal dryout curves laboratory instrument

Reliable and compliant all-in-one solution

The ASTM D5334 compliant VARIOS uses the transient line heat source method. That means it’s a reliable measurement with short heating phases and low heating power. This reduces water movement due to heating and convection and reduces the measurement time. It automatically corrects for temperature drift, and heating power and time can be optimized for specific materials or properties. Plus, every dryout curve has hundreds of data points, so you get the detailed information you need to make the right decisions. And VARIOS is an all-in-one solution. It comes with everything you need to make complete thermal dryout curves including cables, installation tool, and software. There’s nothing else like it on the market.

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  • Low cost, flexible, robust, and easy to use
  • Automated measurement saves time and effort
  • Continuous and precise weight measurements make it possible for a direct correlation between thermal conductivity and water content
  • Ability to define relevant parameters for your specific application
  • Two measurement methods: continuous and point by point
  • Space saving design and ability to measure smaller samples
  • All in-one, user-friendly data acquisition and evaluation software
  • Conforms to industry standards ASTM D5334
  • Reliable measurement with short heating phases and low heating power
  • Temperature measurement accuracy +/- 0.1 °C and resolution 0.01 °C
  • Automatic temperature drift correction
  • High measurement accuracy and wide range of application with adjustable measurements
  • Heating power and time can be optimized for specific materials/properties
  • Can perform parallel weight measurements
  • Use the HYPROP/VARIOS Connector to calculate soil moisture release curves and thermal dryout curves simultaneously.

A photo of VARIOS automated thermal dryout curves laboratory instrument

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