Temperature compensated liquid level sensor using FBGs and a Bourdon tube

D. Sengupta; M. Sai Shankar; P. Vengal Rao; P. Saidi Reddy; R. L. N. Sai Prasad; P. Kishore; K. Srimannarayana

doi:10.1117/12.905702

29 November 2011 Temperature compensated liquid level sensor using FBGs and a Bourdon tube

D. Sengupta, M. Sai Shankar, P. Vengal Rao, P. Saidi Reddy, R. L. N. Sai Prasad, P. Kishore, K. Srimannarayana

Proceedings Volume 8311, Optical Sensors and Biophotonics III; 83110R (2011) https://doi.org/10.1117/12.905702
Event: SPIE/OSA/IEEE Asia Communications and Photonics, 2011, Shanghai, China

Abstract

A temperature compensated liquid level sensor using FBGs and a bourdon tube that works on hydrostatic pressure is presented. An FBG (FBG1) is fixed between free end and a fixed end of the bourdon tube. When hydrostatic pressure applied to the bourdon tube FBG1 experience an axial strain due to the movement of free end. Experimental result shows, a good linearity in shift in Bragg wavelength with the applied pressure. The performance of this arrangement is tested for 21metre water column pressure. Another FBG (FBG2) is included for temperature compensation. The design of the sensor head is simple and easy mountable external to any tank for liquid level measurements.

Citation Download Citation

D. Sengupta, M. Sai Shankar, P. Vengal Rao, P. Saidi Reddy, R. L. N. Sai Prasad, P. Kishore, and K. Srimannarayana "Temperature compensated liquid level sensor using FBGs and a Bourdon tube", Proc. SPIE 8311, Optical Sensors and Biophotonics III, 83110R (29 November 2011); https://doi.org/10.1117/12.905702

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