Optical fiber-based liquid level sensor

Fluorescent Optical Liquid-level Sensor

FLUORESCENT OPTICAL LIQUID-LEVEL SENSOR Jonathan D. Weiss Sandia National Laboratories* Mail Stop 1081 P.O. BOX 5800 Albuquerque, New Mexico 87185-1081 tel: 505-845-8213 fax: 505-844-2991 ernai~:jdwe@%andia.~ov ABSTRACT An optical method of detecting liquid level is presented that uses fluorescence radiation generated in an impurity-doped glass or plastic slab. In operation, the slab is inserte...

An Optical-Fiber-Based Airborne Particle Sensor

A new optical-fiber-based airborne particle counter is reported. Unlike traditional light-scatter-based techniques, the particle is detected through the drop in optical fiber coupling efficiency as the particle disrupts the electromagnetic mode of the optical beam. The system is simple, substantially smaller than traditional systems, and does not require high power laser input. This makes it at...

Esa Based Fiber Optical Humidity Sensor

Intrinsic Optical Fiber Sensor

The use of more and more complex systems in transportation, bio medical devices, defence, production, systems, etc., that are more and more automated, having to comply with many norms related to low energy consumption, miniaturization, insensivity to modifications of the surrounding conditions, security, etc. induce the need of new sensors that have to be reliable, low cost, easy to produce, if...

A Self-Referencing Intensity Based Polymer Optical Fiber Sensor for Liquid Detection

A novel self-referencing fiber optic intensity sensor based on bending losses of a partially polished polymer optical fiber (POF) coupler is presented. The coupling ratio (K) depends on the external liquid in which the sensor is immersed. It is possible to distinguish between different liquids and to detect their presence. Experimental results for the most usual liquids found in industry, like ...