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Vol. 135, Issue 12, December 2011, pp.118-125

 

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

 
1,* Yew Fong HOR, 1 Hio Giap OOI, 1 Hee C. LIM

1 Tunku Abdul Rahman College University, Microelectronics and Physics Department, Block D300, Jalan Genting Kelang, 53300, Setapak, Kuala Lumpur, Malaysia

* E-mail: horyf@mail.tarc.edu.my

 

 

Received: 24 August 2011   /Accepted: 16 December 2011   /Published: 28 December 2011

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Abstract: 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.

 

Keywords: Induction sensor, Owens’ bridge, Non-invasive, ppm

 

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