The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Oct. 18, 1994
Filed:
Mar. 26, 1993
Charles D Cooper, Maitland, FL (US);
Debra R Reinhart, Oviedo, FL (US);
Debra R Seligman, Altamonte Springs, FL (US);
University of Central Florida, Orlando, FL (US);
Abstract
Gas flux rate from a surface is measured using an elongated tubular housing having a lower open end and an upper open end with a support positioned within the housing a predetermined distance from the lower open end. A gas sampling wand extends into the housing from the upper open end and is supported on the support. The wand has a lower open end at the support generally co-planar with the lower open end of the housing. An air baffle is coupled to the upper open end of the housing for reducing velocity and pressure fluctuations of atmospheric air entering the housing from the upper end. A detector is coupled to the wand for measuring the concentration of selected gases within the housing. A funnel-shaped hood circumscribes the lower open end of the wand and increases the sample collection area of the wand. An air pump is coupled to the wand for drawing air and gases into the wand from the area adjacent the lower open end of the housing. A gas impervious conduit couples the wand to the detector and a flow control valve is coupled to the conduit for controlling the gas flow rate to the detector. A flow meter is coupled in a gas flow path for providing data representative of the volume of gas flowing to the detector. The gas emission rate from the surface is computed using the gas flow rate data and gas concentration data divided by the area encompassed by the housing.