Fiber Bragg Grating Liquid Level Sensor

The fiber Bragg grating (FBG) liquid level sensor is designed to measure the liquid level inside the sensor chamber. Referencing to a same liquid level (of a liquid reservoir or reference sensor), a group of such sensor interrogated simultaneously by a FBG interrogator can construct a differential settlement measurement system for surface settlement monitoring over a wide area.This system can measure displacement resolution of as small as 50um.

This FBG liquid level sensor can be integrated with other FBGbased sensors with dedicated measurement capability to construct a comprehensive fiber-based sensing network for multiple measurands (displacement, strain, vibration, etc.).