Find Thermal Conductivity and Diffusivity
Sturdy and affordable Needle Thermal Resistivity and Conductivity Probe.
The East 30 Sensors Thermal Conductivity Sensor is ASTM D5334-14 compliant and accurate in many applications including:
Laboratory and Field
ASTM D5334-14 compliant*
*When used in conjunction with Campbell Scientific datalogger, and programmed according to the standard.
Accuracy: ± 5%
Head is 25 x 13 x 13 mm long
Needle is 60mm x 1.27mm diameter.
Temperature Sensor: 10K Precision Thermistor.
Material: Epoxy and Delrin head, Stainless steel needle
Cable length: 2m standard (additional cable available.)
East 30 Sensors Thermal Conductivity Sensors are affordable accurate thermal conductivity and thermal resistivity sensors for use in research and field settings. These probes are for use with a Campbell Scientific Dataloggers. For more information, see datalogger compatibility, or Turn-key solutions if you have no experience with these loggers.
The Thermal Conductivity sensor requires only a datalogger for proper use. We recommend and support Campbell Scientific loggers, as they have the appropriate resolution to give accurate
The Thermal Conductivity sensor consists of a 60mm long stainless steel needle containing 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 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.
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)