Accession Number : ADD008821

Title :   Bias-Compensated, Ionization Sensor for Gaseous Media and Method for Attaining Proper Bias for Same.

Descriptive Note : Patent Application,


Personal Author(s) : Bainbridge,Augustus S

Report Date : 18 May 1981

Pagination or Media Count : 15

Abstract : This invention relates to an ionization detector unit innovatively adapted to provide mobility to the unit and to render it especially suitable for convenient field use in point-source sampling and monitoring of the compositional characteristics of a gaseous medium such as, for example, the ambient atmosphere, and in emitting a discernible electrical signal which in response to a perceptible change in the compositional characteristics in the medium being monitored by the detector will be altered sufficiently to activate, or trigger, a suitable alarm or warning mechanism. The detector unit includes an ionization sensor cell for emitting an output signal and is powered by a suitable electrical source such as, for example, a miniature power source, and means for delivering or feeding to the sensor cell a representative stream or flow of the gaseous medium to be ionization monitored, and features a method and means for effectively compensating for variations and/or fluctuations in the electrical output signal emitted by the sensor cell as a consequent result of variations and/or fluctuations occurring in the rate of flow of the medium being delivered to and monitored thereby. The featured means is in the form of a low-voltage, battery-operated, bias device.

Descriptors :   *Patent applications, *Gas detectors, Trace gases, Sensitivity, Ionization, Monitors, Bias, Stability, Setting(Adjusting), Trigger circuits, Warning systems, Lightweight, Low voltage, Reliability

Subject Categories : Test Facilities, Equipment and Methods

Distribution Statement : APPROVED FOR PUBLIC RELEASE