Vol. 89, Issue 3, March 2008, pp.83-92

A Modified Design of an Anemometric Flow Transducer

S. C. Bera and N. Mandal

 Instrumentation Engineering Section, Applied Physics, University of Calcutta,

92, Acharya Prafulla Chandra Road, Kolkata - 700009, W.B. India

E-mail: scb152@indiatimes.com, nirupama_cal@rediffmail.com

Received: 3 March 2008   /Accepted: 17 March 2008   /Published: 24 March 2008

Abstract: In an anemometric flow transducer, the effect of flow rate of a fluid on the heat transfer from a heated surface in contact with the flowing fluid is utilized in order to measure the mass flow rate of the fluid. In the present paper a modified approach of design of an anemometric flow transducer has been described. In this transducer the temperature sensing IC AD590 has been used as a flow sensing element and the effect of fluid temperature has been eliminated by using four identical IC units. The performance of this transducer has been theoretically analyzed. Experiment has been performed to verify the theoretical characteristic equations. The results of experimental study are presented in the paper. A linear characteristic in the laminar condition and a nonlinear characteristic in the turbulent condition with very good repeatability have been observed

Keywords: Anemometer, flow transducer, heat transfer co-efficient, temperature  sensing IC.

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