Fiberoptic diisocyanate personal monitoring device

Steven A. Lis

doi:10.1117/12.682022

17 October 2006 Fiberoptic diisocyanate personal monitoring device

Steven A. Lis

Proceedings Volume 6377, Advanced Environmental, Chemical, and Biological Sensing Technologies IV; 63770A (2006) https://doi.org/10.1117/12.682022
Event: Optics East 2006, 2006, Boston, Massachusetts, United States

Abstract

Diisocyanates are produced by the millions of tons per year and are used for the large scale production of polyurethane products that range from coatings, to solid castings, and to industrial foam products. Occupational exposure has been linked to asthma-like symptoms and is a significant occupational concern requiring personal monitoring devices for employees that are sensitive and accurate in the parts per billion range. A novel design fiber optic chemical sensor has been developed which has demonstrated sensitivity of 0.2 ppb (parts per billion) for a 20 minute exposure in air for multiple isocyanate species. Sensor response is very linear over the range of 0 to 25 ppb. The sensor is based on a novel, long fiber, evanescent wave design that provides high sensitivity while maintaining low materials cost. Experimental performance results are presented, as well as a novel measurement approach that provides excellent linearity. Sensitivity to interference by humidity is modest. Sensor packaging can be directly compatible for passive use in personal monitoring and the sensor us reusable. The sensor is simple and inexpensive to fabricate, and can be easy to process by the user in an automated instrument. Sensor processing is simple and is a nearly all dry process. The solid-state sensor can be packaged in a convenient size for personal monitoring. Highly quantitative sensor response is provided by a unique data analysis process that can be readily automated and provides high linearity over a range that is of direct applicability to sensing needs.

Citation Download Citation

Steven A. Lis "Fiberoptic diisocyanate personal monitoring device", Proc. SPIE 6377, Advanced Environmental, Chemical, and Biological Sensing Technologies IV, 63770A (17 October 2006); https://doi.org/10.1117/12.682022

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KEYWORDS

Sensors

Fiber optics sensors

Humidity

Absorbance

Optical testing

Optical fibers

Composites

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