Sensors & Transducers (Dec 2011)

Low Cost Frequency Independent Induction Sensor for Low Concentration (ppm) D(+)-Glucose Monohydrate Detection

  • Yew Fong HOR,
  • Hio Giap OOI,
  • Hee C. LIM

Journal volume & issue
Vol. 135, no. 12
pp. 118 – 125

Abstract

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A low cost induction sensor that is independent of the input source frequency is designed, constructed, and tested for low concentration of aqueous Glucose-D solutions in ppm range detection. A balanced Alternating Current (AC) Owens full bridge is adopted for the measurement. The induction sensor used is a small solenoid coil with low matching impedance. A model of the induction coil sensitivity is simulated using CST Studio Suite with a mesh size of approximately 1.5 million 3D tetrahedron cells with GPUs. The induction sensor is highly sensitive and is capable to measure Millipore Milli-Q low resistivity (18.2 MOhm·cm) ultrapure water as well as varies different prepared Glucose-D solutions in nV range with the help of the phase-lock-loop lock-in amplifier via a Labview program. The data acquisition is acquired using a custom-programmed Labview program. The calculated induction sensor sensitivity is -1.716 ´ 10-4 /ppm with high correlation constant R2 = 0.9571 in terms of Glucose-D concentration.

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