Vol. 107, Issue 8, August 2009, pp.42-51

Design of a PC Based Pressure Indicator Using Inductive Pick-up Type Transducer and Bourdon Tube Sensor

¹S. C. BERA, ²N. MANDAL, ²R. SARKAR and ¹S. MAITY

¹Instrumentation Engineering, Department of Applied Physics, University of Calcutta,

92 A.P.C Road, Kolkata-700009, India

² Asansol Engineering College, Vivekananda Sarani, Asansol-713305, West Bengal, India

E-mail: scbera_cal52@rediffmail.com, nirupama_cal@rediffmail.com, rajan_maa@rediffmail.com

Received: 18 May 2009   /Accepted:  15 August 2009   /Published:  25 August 2009

Abstract: Bourdon tube is a mechanical type pressure sensor and the bourdon gauge measures gauge pressure of a process pipe line or a process tank. But it is a local indicator and special costlier techniques are required to transmit the reading of bourdon gauge to a remote distance. In the present paper, a very simple inductive pick-up type technique has been developed to transmit the reading of bourdon gauge to a remote distance in the form of 1-5 Volt D.C. signal. This signal has been optically isolated to design a PC based pressure indicator using Labtech Note Book Pro software. The theoretical analysis of the whole technique has been presented in the paper. The instrument developed using this technique has been experimentally tested and the experimental results are reported in the paper. A good linearity and repeatability of the instrument has been observed.

Keywords: Gauge pressure, Bourdon tube, Inductive pick-up type transducer, Opto-isolator, PC based indicator

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