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:
Jan. 03, 2012
Filed:
Mar. 26, 2008
Edward P. Locke, Norfolk, VA (US);
Thomas Clifford, Virginia Beach, VA (US);
Robert B. Jeffers, Virginia Beach, VA (US);
Julian E. Parker, Iii, Chesapeake, VA (US);
Edward P. Locke, Norfolk, VA (US);
Thomas Clifford, Virginia Beach, VA (US);
Robert B. Jeffers, Virginia Beach, VA (US);
Julian E. Parker, III, Chesapeake, VA (US);
K & M Environmental, Inc., Virginia Beach, VA (US);
Abstract
An air monitoring apparatus includes, in an exemplary embodiment, a housing having at least one fluid passage to permit a fluid to enter the housing, and a constituent detection device positioned in the housing. The detection device includes at least one electrode, a power supply electrically coupled to the at least on electrode, and a logic circuit electrically coupled to the power supply. The logic circuit is configured to detect a change in at least one of impedance magnitude and a phase shift angle magnitude over a range of frequencies when the detection device contacts at least one fluid constituent contained in the fluid flowing into the cartridge through the at least one fluid passage, or when the detection device contacts at least one constituent in a solid whose chemical and/or material properties change as a function of fluid flowing into the housing through the at least one fluid passage.