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Rapid, in situ Thermal Conductivity Measurements—Even in Moist Insulating Materials

Dr. Gaylon Campbell shows how to measure the thermal conductivity of wet insulation with a 5-minute read time. These previously impossible measurements are now possible through advanced electronics and analytical methods.

Steady state methods for measuring thermal conductivity in insulation are painstakingly slow. The temperature gradient inherent to the method also induces moisture movement within moist samples, making it unsuitable for such measurements. This seminar describes a new algorithm, used with a line heat source, to measure thermal conductivity of insulating materials in one minute, even in the presence of moisture.

In this 30-minute webinar, Dr. Gaylon Campbell, world-renowned environmental measurement expert, describes: 

  • The science behind the transient method, how to apply it, and how it performs on insulating materials
  • How moisture affects the thermal conductivity of insulation
  • Why only transient methods correctly measure the thermal conductivity of insulation when moisture is present
  • How to determine the volumetric specific heat of insulation, to use as input to the measurement 

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Our scientists have decades of experience helping researchers and growers measure the soil-plant-atmosphere continuum. 


Dr. Gaylon S. Campbell has been a research scientist and engineer at METER for 19 years following nearly 30 years on faculty at Washington State University.  Dr. Campbell’s first experience with environmental measurement came in the lab of Sterling Taylor at Utah State University making water potential measurements to understand plant water status.  Dr. Campbell is one of the world’s foremost authorities on physical measurements in the soil-plant-atmosphere continuum.  His book written with Dr. John Norman on Environmental Biophysics provides a critical foundation for anyone interested in understanding the physics of the natural world.   Dr. Campbell has written three books, over 100 refereed journal articles and book chapters, and has several patents.

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