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Vol. 105, Issue 6, June 2009, pp.1-9





Development of an Intelligent Capacitive Mass Sensor Based on Co-axial Cylindrical Capacitor


aAmir ABU_AL_AISH, aMahfoozur REHMAN, aAnwar Hasni ABU HASSAN and aMohd Rizal ARSHAD

a School of Electric and Electronic Engineering, University Science Malaysia, Engineering Campus,

14300 Nibong Tebal, P. Pinang, Malaysia



Received: 7 April 2009   /Accepted: 22 June 2009   /Published: 30 June 2009


Abstract: The paper presents a linear, robust and intelligent capacitive mass sensor made of a co-axial cylindrical capacitor. It is designed such that the mass under measurement is directly proportional to the capacitance of the sensor. The average value of the output voltage of a capacitance to voltage converter is proportional to the capacitance of the sensor. The output of the converter is measured and displayed, as mass, with the help of microcontroller. The results are free from the effect of stray capacitances which cause errors at low values of capacitances. Developed sensor is linear, free from errors due to temperature and highly flexible in design. The proto-type of the mass sensor can weigh up to 4 kilogram only.


Keywords: : Intelligent sensor, Mass sensor, Accurate measurement of capacitance, Microcontroller based measurement, Capacitive sensors


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