Accession Number : ADD000968

Title :   Carbon Dioxide Concentration Sensor.

Descriptive Note : Patent,


Personal Author(s) : Villarroel,Fernando ; Joyce,James W , Jr

Report Date : 04 Sep 1973

Pagination or Media Count : 5

Abstract : One object of this invention is to provide a novel flueric gas analysis apparatus. Another object is to provide a novel system for determining the percent concentration of a particular gas relative to a carrier gas. A further object is to provide a system for continuously analyzing a mixed gas and for providing a nearly instantaneous readout of the result of the analysis. Yet another object is to provide a gas analysis apparatus which is safe to use even in hazardous atmospheres. Briefly, these and other objects of the invention are achieved by passing a stream of a known carrier gas and a stream of the carrier gas combined with an unknown concentration of another gas through separate dehumidifiers. From the dehumidifiers, the gas streams are fed to separate dehumidifiers. A beat frequency oscillation occurs in the sonic transmission line which is appropriately processed to provide an indication of the unknown gas concentration.

Descriptors :   *Patents, *Carbon dioxide, *Gas detectors, Fluidic control, Samplers

Subject Categories : Test Facilities, Equipment and Methods

Distribution Statement : APPROVED FOR PUBLIC RELEASE