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Gas flow meter using a positive temperature coefficient thermistor as the sensor (1999)

Chatterjee, Suman ; Sengupta, Kamalendu ; Maiti, Himadri S.

[S.l.] : American Institute of Physics (AIP)

Review of Scientific Instruments 70 (1999), S. 3949-3954

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ISSN: 1089-7623

Source: AIP Digital Archive

Topics: Physics , Electrical Engineering, Measurement and Control Technology

Notes: 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. © 1999 American Institute of Physics.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1063/1.1150018

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