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Sensors 2014, 14(5), 8423-8429; doi:10.3390/s140508423

A High-Sensitivity Current Sensor Utilizing CrNi Wire and Microfiber Coils

* ,
Institute of Photonics Technology, Jinan University, Guangzhou 510632, China
* Author to whom correspondence should be addressed.
Received: 25 January 2014 / Revised: 18 April 2014 / Accepted: 2 May 2014 / Published: 12 May 2014
(This article belongs to the Section Physical Sensors)
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We obtain an extremely high current sensitivity by wrapping a section of microfiber on a thin-diameter chromium-nickel wire. Our detected current sensitivity is as high as 220.65 nm/A2 for a structure length of only 35 μm. Such sensitivity is two orders of magnitude higher than the counterparts reported in the literature. Analysis shows that a higher resistivity or/and a thinner diameter of the metal wire may produce higher sensitivity. The effects of varying the structure parameters on sensitivity are discussed. The presented structure has potential for low-current sensing or highly electrically-tunable filtering applications.
Keywords: microfiber; current sensor; sensitivity; chrome-nickel wire microfiber; current sensor; sensitivity; chrome-nickel wire
This is an open access article distributed under the Creative Commons Attribution License (CC BY) which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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Xie, X.; Li, J.; Sun, L.-P.; Shen, X.; Jin, L.; Guan, B.-O. A High-Sensitivity Current Sensor Utilizing CrNi Wire and Microfiber Coils. Sensors 2014, 14, 8423-8429.

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