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A new Peltier sensor for measuring the thermal conductivity of fluids

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5 Author(s)
Machut, C. ; Lab. Capteurs et Instrum., Lille I Univ., Villeneuve d''Ascq, France ; Gaviot, E. ; Godts, P. ; Sakly, S.
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This paper describes a new sensor and method to measure the thermal conductivity of many fluids. The principal advantage of the sensor is self-compensation against temperatures brought about by an appropriate choice of materials. Moreover, because the sensor uses both the Peltier and Seebeck effects, measurements can be carried out with accuracy according to an average temperature increase of the device lower than 5 K. Operation of the device brings about a very low Joule power (5 mW). A coherent design rationale is formulated and the various stages in the technical development of the sensor are delineated. Several cases are discussed with a view toward increasing the applicability of the method. Notable applications include thermal conductivity gauges for measuring pressures in high-vacuum systems, tank gauging for liquids featuring fire hazards, and low-velocity measurements occurring in natural convection mechanisms. It is expected that the versatility of the device will result in a wide variety of industrial applications

Published in:

Instrumentation and Measurement, IEEE Transactions on  (Volume:46 ,  Issue: 5 )

Date of Publication:

Oct 1997

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