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Abstract
Rotameter is a local indicating and variable area type flow sensor that requires a special type of transducer for the transmission of its readings to remote site. In this paper, capacitive type rotameter is designed and analysed. The bob of rotameter is connected with a thin wire while another end of that straight wire is connected with a thin rectangular shape aluminium oxide plate, which lies between parallel plate capacitors. The modified De Sauty’s Bridge has been used for measuring the variation in capacitance with respect to flow rate. The bridge output passes through voltage to current converter to achieve 4–20 mA signals.
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Notes on contributors
Anamika Lata
Anamika Lata received BE degree in instrumentation engineering from Sathyabama University Chennai, India, and MTech degree in electronics and communication from IIT (ISM) Dhanbad, India. She is currently pursuing PhD degree with the Department of Electronics Engineering, IIT(ISM) Dhanbad, India. Her current research interests include sensor and transducer development. E-mail: [email protected]
Nirupama Mandal
Nirupama Mandal received BSc (Hons) degree in physics, BTech degree in instrumentation engineering, MTech degree in instrumentation and control engineering, and the PhD degree in instrumentation engineering from the University of Calcutta, Kolkata, India. She is working as an assistant professor in the Department of Electronics in IIT(ISM) Dhanbad, India. She has authored more than 50 papers in international journals and conference proceedings. Her current research interests include transducer design, PC based instrumentation, controller design, and MEMS. Corresponding author. Email: [email protected]