1. Vatell Corporation, P.O. Box 66, Christiansburg, VA 24068, USA, http://www.vatell.com.
2. Hukseflux Thermal Sensors B.V., Elektronicaweg 25, 2628 XG Delft, The Netherlands, http://www.hukseflux.com.
3. Rdf HFS-C Industrial Heat Flux Sensors, http://www.rdfcorp.com/.
4. Captec Entreprise, 47 rue Jeanne d’Arc 59000 Lille, France, http://www.captec.fr.
5. Heat flux sensor with minimal impact on boundary conditions;Saidi;Experimental Thermal and Fluid Science,2004