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Accession Number:
AD0641670
Title:
AN EVALUATION OF LOW-COST CARBON MONOXIDE INDICATORS.
Descriptive Note:
Technical rept.,
Corporate Author:
FEDERAL AVIATION AGENCY WASHINGTON D C AIRCRAFT DEVELOPMENT SERVICE
Report Date:
1966-07-01
Pagination or Media Count:
36.0
Abstract:
The Detector reacts to provide color warning to indicate the presence of minute concentrations of carbon monoxide in an atmosphere contaminated with engine exhaust gases. Upon continuous exposure to carbon monoxide, the sensitized spot on the Detector will turn darker at a rate dependent upon the concentration of carbon monoxide and humidity of the surrounding atmosphere. The water vapor present in the atmosphere retards Detector reaction to carbon monoxide, particularly under the extended exposure periods required to indicate low concentrations. The consistency of response when the Detector was exposed to carbon monoxide was excellent under a given set of conditions. Regeneration and hence, reuse of the Detector following reaction to carbon monoxide was limited by critical time periods of exposure andor critical intensities of reaction. Continuous exposure of the Detector to traces of carbon monoxide will result in overexposure and loss of effectiveness within one to five hours time. The Detector will provide effective monitoring in the cabin for periods up to 30 days, provided it does not come in contact with traces of carbon monoxide on a prolonged basis. Although the Detector cannot be used to measure exact concentrations of carbon monoxide, it may be utilized to estimate the presence of SAFE, MARGINAL or DANGEROUS concentrations when used in conjunction with the instruction card incorporating a color scale developed from the results of testing reported herein. The sensitivity of the NO-CO Indicator was not adequate for use of this indicator in general aviation aircraft. Author
Distribution Statement:
APPROVED FOR PUBLIC RELEASE
