Temperature compensated liquid level sensor using FBGs and a bourdon tube

Author

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

Author_Institution

Dept. of Phys., Nat. Inst. of Technol., Warangal, India

fYear

2011

fDate

13-16 Nov. 2011

Firstpage

1

Lastpage

6

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.

Keywords

Bragg gratings; compensation; fibre optic sensors; level measurement; optical fibres; Bragg wavelength; FBG; axial strain; bourdon tube; fibre Bragg gratings; hydrostatic pressure; liquid level sensor; temperature compensation; Abstracts; Cavity resonators; Electron tubes; Liquids; Optical sensors; Pressure gauges; Temperature distribution; Bourdon tube; FBG sensor; Hydrostatic Pressure; Liquid level; Temperature;

fLanguage

English

Publisher

ieee

Conference_Titel

Communications and Photonics Conference and Exhibition, 2011. ACP. Asia

Conference_Location

Shanghai

ISSN

2162-108X

Print_ISBN

978-0-8194-8961-6

Type

conf

DOI

10.1117/12.905702

Filename

6210883