In the present study, a novel dual-optical-fiber-sensor system
comprising a fiber Bragg grating (FBG) level sensor and a
Fabry-Pérot (FP) pressure sensor is proposed. The sensitivities
of the two sensors are evaluated experimentally, and analytical
formulae are then proposed for obtaining the unknown level
and specific gravity of a liquid simultaneously. In addition,
a calibration method is proposed in Section 4 using actual
measurement values for enhancing the accuracy of the measurement
results. Finally, the performance of the proposed
dual-optical-fiber-sensor system is evaluated experimentally.