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Proceedings Paper

In-line infrared sensors covering the midinfrared from 2 to 14 micrometers (5000 to 700 cm-1)
Author(s): Paul A. Wilks
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Paper Abstract

The wide spread use of FT-IR spectrometers has created many potential applications for MIR spectroscopy in quality control and process monitoring. Because of the complexity, cost and environmental requirements of FT-IR spectrometers, it is usually impractical to move them into the field or along side the process stream. Portable MIR instruments such as the Wilks Infracal Filtometers are filling the need for field measurements. For in-line sensing, ATR probes combined with optical fibers or light pipes are being installed to transmit absorption data to remotely located FT-IR instruments. While such installations have performed satisfactorily in some applications, optical fibers are limited in energy transmission efficiency and in the MIR are extremely expensive. A new type of MIR sensor has been developed by Wilks Enterprise, Inc. called the IR Plug, that makes the absorption measurement directly in stream, transmitting digital concentration information to a remote PC or display panel. The Wilks IR Plug eliminates the need for optical fibers, light pipes and the FT-IR spectrometer itself.

Paper Details

Date Published: 22 February 2002
PDF: 7 pages
Proc. SPIE 4577, Vibrational Spectroscopy-based Sensor Systems, (22 February 2002); doi: 10.1117/12.455724
Show Author Affiliations
Paul A. Wilks, Wilks Enterprise, Inc. (United States)

Published in SPIE Proceedings Vol. 4577:
Vibrational Spectroscopy-based Sensor Systems
Steven D. Christesen; Arthur J. Sedlacek III, Editor(s)

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