A thick layer gas sensor, fabricated in the Faculty of Microsystem Electronics and Photonics at Wrocław University of Technology has been used in the construction of a heat conductivity flowmeter. It was found, that about 60 % of the energy is dissipated from the heated sensor by heat conductivity of a surrounding gas at the atmospheric pressure. Two methods of the heater supply conditions have been studied: U=constant and T=constant. Measuring range of the designed heat coductivity flow-meter was 10(-2) W +20W.
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