22 January 1999 Performance comparison of advanced online sensors for steel-treatment atmosphere control
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Three novel atmosphere gas composition monitoring methods are described that could significantly improve the quality control of steel heat treat processes. The proposed methods, gas chromatography, inter-cavity Raman analysis, and fiber- optic Raman analysis are in different stages of development but all have varying advantages over the current state of the art IR analysis. A summary description of the Raman principle is provided. Test results comparing the inter- cavity Raman analysis versus the gas chromatography analysis are given. The major disadvantage of the gas chromatography is the slow response. The cost-effective inter-cavity Raman device can monitor eight species simultaneously with a response in the order of tens of milliseconds. An in-situ fiber optic Raman analysis instrument is expanded and carburizing facility test with this novel device are described. Advantages of the fiber-optic instrument are the in-situ nature and the fast response. This instrument lends itself to be readily used in applications where hostile environments require monitoring.
© (1999) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Wim A. de Groot, Wim A. de Groot, Ronald Rich, Ronald Rich, } "Performance comparison of advanced online sensors for steel-treatment atmosphere control", Proc. SPIE 3535, Advanced Sensors and Monitors for Process Industries and the Environment, (22 January 1999); doi: 10.1117/12.337477; https://doi.org/10.1117/12.337477

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