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FEATURES & BENEFITS

Sensors provide easy determination of thermal conductivity.

Thermal conductivity is calculated using the accepted method of measurement.

Simple, sturdy design allows for the sensor to be used in the lab or in the field for long periods of time.

Portable and easy to use, these sensors don't require complex calibrations or setup.

Extra cable is available. No matter how far away from what you want to measure, you can either go to it or get enough cable to span the distance.

Includes both prewritten programs for the dataloggers and macros to interpret the data quickly and easily.

The single needle probe is the accepted measurement standard for thermal conductivity.

LINKS

GEOPHYSICAL RESEARCH LETTERS

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The thermal conductivity sensor can be used to measure the thermal conductivity of granular materials and gels.

APPLICATIONS

  • Measuring thermal conductivity of soil for agronomic and engineering applications.
  • Measuring thermal conductivity of foods to optimize cooking or baking times.
  • Measuring thermal conductivity of insulating materials for use in engineering design.

SPECIFICATIONS

Dimensions: Handle is 25 x 13 x 13 mm long, Needle is 60mm long, 1.27mm diameter.

Heater resistance:
70 ohms (1041.5 ohm/meter).
Temperature Sensor: 10K Precision Thermistor.
Cable length: 2m standard (additional cable available.)

THEORY

The thermal conductivity sensor consists of a 60mm long stainless steel needle. The needle contains an Evanohm heater and a precision 10K thermistor. The thermal conductivity of a material is determined by inserting the needle in the material, applying current to the heater, and monitoring the temperature rise with the thermistor. The thermal conductivity can be calculated from the power input and temperature rise during a 1 to 2 minute heating period.

The East 30 Sensors Thermal Conductivity Sensor is based on the accepted methods and technology for the measurement of thermal conductivity. for datalogger compatibility.

PUBLISHED PAPERS

American Society of Agronomy, Method of Soil Analysis, Part 1 Second Edition, Monograph 9, Chapter 39.

Bristow, K.L., R.D. White, and G.J. Kluitenberg (1994). Comparison of Single and Dual Probes for Measuring Soil Thermal Properties with Transient Heating. Australian Journal of Soil Research 32:447-464

Shiozawa and G.S. Campbell, 1990 Remote Sensing Review. Soil Thermal Conductivity: Vol. 5(1) 301-310.

de Vries, D.A. (1963). Thermal Properties of soils. Physics of Plant Environment. (Ed. W. R. Van Wijk.) pp. 210-35 (North-Holland: Amsterdam)

Putkonen, J.K. 1998. Soil Thermal Properties and Heat Transfer Processes near Ny Alesund, northwestern Spitsbergen, Svalbard. Polar Research, Vol. 17 (2), pp.165-179. Norwegian Polar Research Institute.

Putkonen, J. K., Climatic control of the thermal regime of permafrost, northwest Spitsbergen., Ph.D Dissertation thesis, University of Washington,
Seattle, 1997

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