An indirectly heated PTC resistor is described which was developed for sensitive measurements of low pressures and of high air velocities. The basic circuit which has provided high sensitivity in such measurements is discussed in the last part of the paper.
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Research Article| December 29 2004
Indirectly Heated PTC Resistor for Measuring Air Flow
Kamil Kraus; Indirectly Heated PTC Resistor for Measuring Air Flow. Rev. Sci. Instrum. 1 August 1965; 36 (8): 1191–1194. https://doi.org/10.1063/1.1719836
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