Sample interface in on-line process sensing: liquid phase and gas phase sampling of optically homogenous processes

Richard D. Driver; G. Dewey; David A. Greenberg; John D. Stark

doi:10.1117/12.166284

31 December 1993 Sample interface in on-line process sensing: liquid phase and gas phase sampling of optically homogenous processes

Richard D. Driver, G. Dewey, David A. Greenberg, John D. Stark

Author Affiliations +

Proceedings Volume 2069, Optical Methods for Chemical Process Control; (1993) https://doi.org/10.1117/12.166284
Event: Optical Tools for Manufacturing and Advanced Automation, 1993, Boston, MA, United States

Abstract

The quantification of chemical processes in real time using infrared fiber-remote absorption spectroscopy requires the accurate sampling of the chemical species at a well defined and reproducible absorption pathlength. Sensors and sampling methods are described which are tailored to the type of process and process conditions being monitored. The optical fiber parameters which effect process sampling and measurement accuracy are reviewed. Sampling techniques are discussed for homogeneous liquid phase and gas phase measurements. The use of flow through cells for side stream monitoring and immersible probes for in-line monitoring of liquid phase streams are covered in detail. Sensor pathlength calibration of a variable path immersible transmission probe is discussed.

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Richard D. Driver, G. Dewey, David A. Greenberg, and John D. Stark "Sample interface in on-line process sensing: liquid phase and gas phase sampling of optically homogenous processes", Proc. SPIE 2069, Optical Methods for Chemical Process Control, (31 December 1993); https://doi.org/10.1117/12.166284

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