Goib Wiranto, I Dewa Putu Hermida, Hiskia, Beni Rama, Dadi Rusdiana
In this paper, the design and fabrication of a liquid conductivity sensor based on AgPd paste will be described. The device was designed in a four-electrode configuration on a 10 x 25 mm2 96% Al2O3 substrate. The distance between the two driving electrodes was 4 mm, whereas the distance between the two measuring electrodes was 2 mm.The device was also integrated with a Ruthenium based temperature sensor printed on the backside of the substrate. Initial characterisation showed that the conductivity sensor has a measured sensitivity and cell constant of 1.67 cm and 0.51 cm-1, respectively, when a frequency of 1 kHz square wave input was appliedto the driving electrodes. Sensor’s respond variation against temperature was measured around 27.89 μS/°C, corresponding to 2.22 temperature compensation value for salt solution. The results showed a stable response over 5 days measurement cycle, indicating the sensor’s potential for field water quality monitoring application. © 2017 Trans Tech Publications, Switzerland.
Research Center for Electronics and Telecommunication, Indonesian Institute of Sciences (LIPI), Bandung, 40135, Indonesia; Department of Physics Education, Indonesian University of Education, Bandung, 40154, Indonesia
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