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Electrochemical Gas Sensors for Mine Atmospheres: Portable Detectors for Carbon Monoxide and for Nitric Oxide/nitrogen Dioxide Mixtures.
NTIS: PB/81-214934 :212 pages
A portable detector for mixtures of nitric oxide and nitrogen dioxide was developed using a porous silver cathode in sulfuric acid supporting electrolyte. Nitrogen dioxide was determined in the gas stream by electro-reduction. The nitric oxide in the gas stream was oxidized to nitrogen dioxide by passing it over cr (VI) on firebrick. Electroreduction gave the sum of no + NO2. Analog circuitry was used to display the amounts of no and NO2 separately. Two ranges available for each gas were, in parts per million, 0 to 10 and 0 to 50 for no, and 0 to 2 and 0 to 10 for NO2.
CP; Final Contract Report;
NTIS Accession No.
State Univ. of New York
Page last reviewed: September 2, 2020
Content source: National Institute for Occupational Safety and Health Education and Information Division