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

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

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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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Abstract

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 3.0).
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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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