title: New C4D Sensor with a Simulated Inductor.
abstract: A new capacitively coupled contactless conductivity detection (C(4)D) sensor with an improved simulated inductor is developed in this work. The improved simulated inductor is designed on the basis of the Riordan-type floating simulated inductor. With the improved simulated inductor, the negative influence of the coupling capacitances is overcome and the conductivity measurement is implemented by the series resonance principle. The conductivity measurement experiments are carried out in three pipes with different inner diameters of 3.0 mm, 4.6 mm and 6.4 mm, respectively. The experimental results show that the designs of the new C(4)D sensor and the improved simulated inductor are successful. The maximum relative error of the conductivity measurement is less than 5%. Compared with the C(4)D sensors using practical inductors, the measurement accuracy of the new C(4)D sensor is comparable. The research results also indicate that the adjustability of a simulated inductor can reduce the requirement for the AC source and guarantee the interchangeableness. Meanwhile, it is recommended that making the potential of one terminal of a simulated inductor stable is beneficial to the running stability. Furthermore, this work indirectly verifies the possibility and feasibility of the miniaturization of the C(4)D sensor by using the simulated inductor technique and lays a good foundation for future research work.
authors.affiliation: State Key Laboratory of Industrial Control Technology, College of Control Science and Engineering, Zhejiang University, Hangzhou 310027, China. lychao1990@zju.edu.cn.
authors.forename: Yingchao
authors.initials: Y
authors.lastname: Lyu
authors.affiliation: State Key Laboratory of Industrial Control Technology, College of Control Science and Engineering, Zhejiang University, Hangzhou 310027, China. hfji@iipc.zju.edu.cn.
authors.forename: Haifeng
authors.initials: H
authors.lastname: Ji
authors.affiliation: State Key Laboratory of Industrial Control Technology, College of Control Science and Engineering, Zhejiang University, Hangzhou 310027, China. jaky@cypress.com.
authors.forename: Shijie
authors.initials: S
authors.lastname: Yang
authors.affiliation: State Key Laboratory of Industrial Control Technology, College of Control Science and Engineering, Zhejiang University, Hangzhou 310027, China. zyhuang@iipc.zju.edu.cn.
authors.forename: Zhiyao
authors.initials: Z
authors.lastname: Huang
authors.affiliation: State Key Laboratory of Industrial Control Technology, College of Control Science and Engineering, Zhejiang University, Hangzhou 310027, China. blwang@iipc.zju.edu.cn.
authors.forename: Baoliang
authors.initials: B
authors.lastname: Wang
authors.affiliation: State Key Laboratory of Industrial Control Technology, College of Control Science and Engineering, Zhejiang University, Hangzhou 310027, China. hqli@iipc.zju.edu.cn.
authors.forename: Haiqing
authors.initials: H
authors.lastname: Li
keywords: capacitively coupled contactless conductivity detection (C4D); conductivity measurement; contactless conductivity detection (CCD); series resonance; simulated inductor
references.citation: Anal Chem. 2008 Oct 15;80(20):7826-32
references.pmid: 18781773
references.citation: Anal Chim Acta. 2008 Jan 21;607(1):15-29
references.pmid: 18155405
references.citation: Analyst. 2008 Aug;133(8):1104-10
references.pmid: 18645654
references.citation: Sensors (Basel). 2013;13(3):2786-801
references.pmid: 23447011
references.citation: Electrophoresis. 2004 Oct;25(20):3398-405
references.pmid: 15490445
references.citation: Electrophoresis. 2015 Jan;36(1):195-211
references.pmid: 25113795
references.citation: Anal Chem. 2003 Jan 15;75(2):306-12
references.pmid: 12553766
references.citation: Electrophoresis. 2002 Oct;23(20):3520-7
references.pmid: 12412120
references.citation: Electrophoresis. 2004 Oct;25(20):3387-97
references.pmid: 15490444
references.citation: Talanta. 2007 Dec 15;74(3):358-64
references.pmid: 18371649
references.citation: Talanta. 2013 Jan 30;104:39-43
references.pmid: 23597886
references.citation: Electrophoresis. 2011 Jan;32(1):30-42
references.pmid: 21171111
references.citation: Talanta. 2011 Mar 15;84(1):42-8
references.pmid: 21315895
references.citation: Anal Chem. 1998 Feb 1;70(3):563-7
references.pmid: 21644754
references.citation: Electrophoresis. 2009 Jan;30(1):176-88
references.pmid: 19101932