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MEASUREMENT AND ANALYSIS OF VAPOR SENSORS USED AT UNDERGROUND STORAGE TANK SITES
Citation:
Portnoff, M., R. Grace, AND J. Hibner. MEASUREMENT AND ANALYSIS OF VAPOR SENSORS USED AT UNDERGROUND STORAGE TANK SITES. U.S. Environmental Protection Agency, Washington, D.C., EPA/600/R-95/078 (NTIS PB96101415), 1995.
Description:
This report is a continuation of an investigation to quantify the operating characteristics of vapor sensor technologies used at underground storage tank (UST) sites. n the previous study (EPA/600/R-92/219) the sensitivity, selectivity, and response time to simulated UST environments were measured for metal oxide semiconductor gas sensors and polymer adsorption gas sensors. uring this study, a third vapor sensor technology, the catalytic bead sensor, was selected and tested. he testing was performed using the Carnegie Mellon Research Institute (CMRI) automated gas testing facilities. his automated system monitored the sensors' responses while dynamically exposing them to various mixtures of methane, butane, and xylene. he sensors were also tested to determine the effects of humidity on their responses. ensor responses were characterized by sensitivity, selectivity, speed of response, and speed of recovery to selected test concentrations of methane, butane, and xylene. he test results are presented as a list of sensor specifications to allow for direct comparative, method of collecting and processing sensor data that compare distinct vapor sensor technologies. hese projects were not designed to fully characterize the vapor sensors under study.
