An Optical Fiber Liquid Level Sensor Based on Side Coupling Induction Technology

Figure 3

The liquid level response of the proposed sensor with different geometric parameters of the racetrack column. (a) Comparison of the liquid level response for three sizes; (b)  mm and  mm; (c)  mm and  mm; (d)  mm and  mm. ∆ = 10 mm, , and  nW/mm.

(a)

(b)

(c)

(d)