ISEMA 2021- International Conference on Electromagnetic Interaction with Water and Moist Substances

How We Measure Moisture

Wave on the Beach
Photo by Lance Asper on Unsplash

Did you know that there are 1386 trillion litres of water on our planet? Only 2.5% of this is fresh water. Most of it is bound as ice in the glaciers of the Arctic and Antarctic or is underground as groundwater. Only 0.3% of freshwater is available to us as lakes, rivers and reservoirs.


In most materials in nature, water is a natural component. Water is also needed in many technological processes. Determining the water content in materials is therefore of great importance in many economic areas. 


For example, it is important to test the moisture content of concrete, sand, soil or to determine the humidity of wood, paper or food (e.g. honey). 

There are various established measuring methods to measure moisture

  • Radar
  • Vector Network Analyzer (VNA)

  • Time Domain Reflectometry (TDR)

  • Resonance/microwave methods
  • Conductivity measurement
  • Eps_r - measurement

The measurement should be stable, precise and fast, and the system should be inexpensive and robust.

One answer to this requirement is the Ilmsens UWB - technology:


UWB enables a larger field of view to obtain more additional information. We work with a very broadband signal that interrogates many frequencies at once and thus handles a lot of measurements in a short time.


You need Ilmsens if

  • You need to resolve multiple information or effects (e.g. sample concentration, moisture, temperature, density, thickness, permittivity) at once with a single measurement.
  • Narrow-band measurements do not yield enough information to solve your problem
  • Full-fledged wideband VNA systems are too cost intensive / slow and you need a specific solution


ISEMA 2021: International Conference on Electromagnetic Interaction with Water and Moist Substances

The International Society for Aquametrics (ISEMA), which brings together engineers and scientists as well as partners from industry and government, is concerned with the use of radiofrequency and microwave measurements in relation to the measurement of moisture in a wide range of materials and organisms.


Every two years, ISEMA organises the conference series "International Conference on Electromagnetic Interaction with Water and Moist Substances", at which our colleague Philipp Gelmroth has the pleasure of presenting Ilmsens between 26.07.21 - 30.07.21.  As this year's event is a hybrid event, participation at short notice is certainly still possible.