Fiber Optic Fluid Level Sensor

Madjid A. Belkerdid; Navid Ghandeharioun; Brian Brennan

doi:10.1117/12.949781

3 January 1986 Fiber Optic Fluid Level Sensor

Madjid A. Belkerdid, Navid Ghandeharioun, Brian Brennan

Proceedings Volume 0566, Fiber Optic and Laser Sensors III; (1986) https://doi.org/10.1117/12.949781
Event: 29th Annual Technical Symposium, 1985, San Diego, United States

Abstract

A fiber optic fluid level sensor based on transmission attenuation due to bending loss is described. Fibers formed with reverse curvatures of decreasing radii will induce an increasing amount of lower mode light loss to the cladding as the light propagates along the multimode fiber. The sensor is arranged in the fluid in a vertical orientation such that the light travels along the fiber from the bottom or low fluid point to the top or full point. As the fluid covers increasing lengths of the exposed fiber, it strips ever more power from the cladding (assuming the fluid refractive index is greater than the cladding). Data taken with a sensor of this configuration show a monotonic decrease of output intensity as a function of increasing fluid level. As much as a -14dB change occurred over a one-foot fluid level change. Comparison of these results with a mathematical model shows good agreement.

Citation Download Citation

Madjid A. Belkerdid, Navid Ghandeharioun, and Brian Brennan "Fiber Optic Fluid Level Sensor", Proc. SPIE 0566, Fiber Optic and Laser Sensors III, (3 January 1986); https://doi.org/10.1117/12.949781

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available