Open hardware portable dual-probe heat-pulse sensor for measuring soil thermal properties and water content

2017 ◽  
Vol 133 ◽  
pp. 9-14 ◽  
Author(s):  
Giovanni Ravazzani
Keyword(s):  
Thermal Properties ◽  
Water Content ◽  
Heat Pulse ◽  
Open Hardware ◽  
Pulse Sensor ◽  
Soil Thermal Properties ◽  
Dual Probe

COMPARISON OF TECHNIQUES FOR EXTRACTING SOIL THERMAL PROPERTIES FROM DUAL-PROBE HEAT-PULSE DATA

Soil Science ◽  
1995 ◽  
Vol 160 (1) ◽  
pp. 1-7 ◽  
Author(s):  
KEITH L. BRISTOW ◽  
JIM R. BILSKIE ◽  
GERARD J. KLUITENBERG ◽  
ROBERT HORTON
Keyword(s):  
Thermal Properties ◽  
Heat Pulse ◽  
Soil Thermal Properties ◽  
Comparison Of Techniques ◽  
Dual Probe

Comparison of single and dual probes for measuring soil thermal properties with transient heating

Soil Research ◽  
1994 ◽  
Vol 32 (3) ◽  
pp. 447 ◽  
Author(s):  
KL Bristow ◽  
RD White ◽  
GJ Kluitenberg
Keyword(s):  
Thermal Conductivity ◽  
Heat Capacity ◽  
Thermal Properties ◽  
Thermal Diffusivity ◽  
Heat Pulse ◽  
Volumetric Heat Capacity ◽  
Transient Heating ◽  
Single Probe ◽  
Soil Thermal Properties ◽  
Dual Probe

Storage and transfer of heat in soils is governed by the soil thermal properties and these properties are therefore needed in many agricultural and engineering applications. In this paper we discuss solutions of the heat flow equation applicable to single and dual probe transient heating methods, and describe measurements made on air-dry sand to show how these methods can be used to obtain soil thermal properties. Measurements show that the two methods yield similar values of thermal conductivity. When determining thermal conductivity from the single probe data, it is best to use nonlinear curve fitting and to include a correction term in the model to account for the presence of the probe. Measurements of volumetric heat capacity made by using the dual probe heat-pulse method agreed well with independent estimates obtained using the de Vries method of summing the heat capacities of the soil constituents. The advantage of using the dual probe method together with the appropriate heat-pulse theory rather than the single probe is that all three soil thermal properties, the thermal diffusivity, volumetric heat capacity, and thermal conductivity, can be determined from a single heat-pulse measurement. Instantaneous heat-pulse theory can be used with the dual probe method to determine heat capacity from short duration heat-pulse data, but it should not be used to determine the thermal diffusivity and thermal conductivity.

Laboratory Evaluation of the Dual-Probe Heat-Pulse Method for Measuring Soil Water Content

2003 ◽  
Vol 2 (3) ◽  
pp. 389
Author(s):  
J. M. Basinger ◽  
G. J. Kluitenberg ◽  
J. M. Ham ◽  
J. M. Frank ◽  
P. L. Barnes ◽  
...  
Keyword(s):  
Water Content ◽  
Soil Water ◽  
Soil Water Content ◽  
Pulse Method ◽  
Heat Pulse ◽  
Laboratory Evaluation ◽  
Dual Probe
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