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:
Jun. 16, 2020
Filed:
Jan. 25, 2018
Ludlum Measurements, Inc., Sweetwater, TX (US);
John William Birks, Longmont, CO (US);
Peter Christian Andersen, Superior, CO (US);
Andrew Allen Turnipseed, Arvada, CO (US);
Craig Joseph Williford, Golden, CO (US);
LUDLUM MEASUREMENTS, INC., Sweetwater, TX (US);
Abstract
The present invention makes use of a modular Folded Tubular Photometer to measure the concentrations of gas-phase species and/or particles, including especially air pollutants such as ozone (O), nitrogen dioxide (NO), sulfur dioxide (SO) and black carbon particulate matter, by means of absorbance of ultraviolet (UV), visible or infrared (IR) light. The optical bench makes use of modular components (tubes and mirror assemblies) that allow construction of path lengths of up to 2 meters or more while maintaining low detection cell volumes. The long path lengths, low cell volumes, and the innovation of pressure equalization during the absorbance measurements enable sensitive detection of ambient air pollutants down to low part-per-billion levels or less for gas species, and extinctions down to 1 Mmor less for particulate matter, corresponding to ˜0.13 μg/mor less for black carbon particulates.