@inproceedings{scholars4080, year = {2014}, journal = {Proceedings of IEEE Sensors}, publisher = {Institute of Electrical and Electronics Engineers Inc.}, pages = {2030--2033}, number = {Decemb}, volume = {2014-D}, note = {cited By 8; Conference of 13th IEEE SENSORS Conference, SENSORS 2014 ; Conference Date: 2 November 2014 Through 5 November 2014; Conference Code:112210}, doi = {10.1109/ICSENS.2014.6985433}, title = {Detecting trace amount of water in crude oil with capacitance sensors}, keywords = {Crude oil; Electrodes; Jitter; Low pass filters; Sensitivity analysis, Amplitude variations; Capacitance sensors; Capacitive sensing; Copper electrodes; Detecting trace; Interface circuits; Low-pass filtering; System sensitivity, Capacitance}, url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-84931080907&doi=10.1109\%2fICSENS.2014.6985433&partnerID=40&md5=1e7f2b0d5a3c327b61d62af37d5fbe3a}, abstract = {A capacitive sensing system for trace amount of water content in crude oil is proposed. The capacitance sensor comprises a pair of copper electrodes wrapped around a tube with a 12mm diameter. The interface circuit is based on capacitance to phase angle conversion. A combination of differential sensing and low pass filtering techniques was further introduced to reduce the system sensitivity to jitter and amplitude variation in the main oscillator. Experiment results with Malaysia Dulang oilfield samples show that the proposed system has a sensitivity of 1.5{\^A}o/fF and a detection range of 50 to 638ppm of water content. The system was able to produce a stable output (regular pulse stream without jitter). {\^A}{\copyright} 2014 IEEE.}, issn = {19300395}, author = {Tang, T. B. and Lim, Y. L. and Aslam, M. Z.}, isbn = {9781479901616} }