Chatterjee, Suman and Sengupta, Kamalendu and Maiti, Himadri Sekhar (1999) Gas flow meter using a positive temperature coefficient thermistor as the sensor. Review of Scientific Instruments, 70 (10). pp. 3949-3954. ISSN 0034-6748

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Positive temperature coefficient (PTC) thermistor sensors have been used successfully for sensing and measurement of gas flow through a tube. Tuned detection technique using an ac signal is found to be a more efficient measuring circuit than the conventional dc Wheatstone bridge. Any particular sensor can be used to measure a wide range of flow rates using sensing heads of varying geometries. For a specific geometry, the plot of electrical voltage output against flow rate produces an ``S'' shaped curve which follows from the basic principles of heat transfer by both conduction and convection mechanisms. (C) 1999 American Institute of Physics. [S0034-6748(99)03009-9].

Item Type: Article
Subjects: Electronics
Depositing User: Bidhan Chaudhuri
Date Deposited: 18 Jun 2012 07:49
Last Modified: 18 Jun 2012 07:49

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