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. 2019 Jun 27;19(13):2860. doi: 10.3390/s19132860

Figure 4.

Figure 4

(a) Sensor head based on FBG glued on the Terfenol-D bar and the performance of sensor [31] and (b) tri-axial sensor and the wavelength shift versus magnetic field curves with different preloads [32]; permission conveyed through the Copyright Clearance Center, Inc.