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10 March 1994 Thermoelectric cooled, purge-and-trap device for enhancing the utility of fiber optic VOC sensors
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Proceedings Volume 2068, Chemical, Biochemical, and Environmental Fiber Sensors V; (1994) https://doi.org/10.1117/12.170680
Event: Optical Tools for Manufacturing and Advanced Automation, 1993, Boston, MA, United States
Abstract
A thermoelectric cooled, purge-and-trap device (TEC) has been developed to enhance the utility of fiber optic VOC sensors. This simple device consists of a thin copper radiator sandwiched between two thermoelectric coolers. Two water-cooled, copper heat sinks are used to maintain the hot side surfaces of the thermoelectric coolers at 5 degrees C, allowing internal surface temperatures of the radiator to be controlled between 5 degrees C to -43 degrees C. This paper describes the use of the TEC with a reversible, fiber optic, carbon tetrachloride sensor. The sensor by itself has a detection limit of around 1,000 ppmv carbon tetrachloride in nitrogen. When the sensor is used with the TEC, vapor phase concentrations down to 100 ppmv can be measured.
© (1994) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Eugene A. Mizusawa, Paul F. Daley, Kevin R. Kyle, Kevin C. Langry, and S. Michael Angel "Thermoelectric cooled, purge-and-trap device for enhancing the utility of fiber optic VOC sensors", Proc. SPIE 2068, Chemical, Biochemical, and Environmental Fiber Sensors V, (10 March 1994); https://doi.org/10.1117/12.170680
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