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- W1969498265 abstract "This presentation focuses on mechanical and electro-optical design considerations embodied in VOtectTM -- an infrared fiber optic sensor for volatile organic compounds. Presently, the VOtectTM system is configured for remote detection of hydrocarbon vapors associated with gasoline and other internal-combustion fuels. Using commercially available zirconate glass optical fibers, the sensor exploits the overlap of absorption spectra due to carbon-hydrogen stretching vibrations between 3.3 and 3.6 microns, with the optical output of an infrared HeNe laser operating at 3.39 microns. Compensation for position-dependent fiber bending losses is achieved using 1.15-micron radiation simultaneously emitted by the laser source. Initial laboratory evaluations of the VOtectTM system indicates detection sensitivities well below the lower explosion limits for petroleum distillates, indicating the usefulness of the sensor for petrochemical safety applications. The sensor is intrinsically safe (e.g., explosion-proof), since no electrical power is required at the probe tip. Preliminary sensor optical power budget calculations indicate that the zirconate fiber optic umbilical, which connects the sensor probe to the electro-optical detection system, can be as long as several hundred meters. Calibration data for a variety of hydrocarbons indicate linear relationships between ln(V/Vo) and vapor concentration, suggesting that the sensor should prove useful for on-line, real-time process control applications.© (1994) COPYRIGHT SPIE--The International Society for Optical Engineering. Downloading of the abstract is permitted for personal use only." @default.
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- W1969498265 date "1994-03-10" @default.
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- W1969498265 title "<title>Design considerations for infrared fiber optic sensors</title>" @default.
- W1969498265 doi "https://doi.org/10.1117/12.170671" @default.
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