Patent ID: 9448112
Filing Date: 2016-09-20
CPC Classification: G01J,G01N

Claim Text:
1. An apparatus for analyzing a diesel exhaust fluid quality, comprising: a portion with an opening configured to receive a fluid sample holder, the fluid sample holder having a fluid receiving portion, the fluid sample holder including a sample cell region of rectangular cross-section to define a first dimension for a first path for radiation of first wavelengths through diesel exhaust fluid in the sample cell region and a second dimension longer than and perpendicular to the first dimension to define a second path for radiation of second wavelengths through diesel exhaust fluid in the sample cell region, the first path being shorter than the second path; a first source of radiation of the first wavelengths; a second source for radiation of the second wavelengths; a dual path length spectrometer for receiving collected radiation of the first wavelengths and collected radiation of the second wavelengths after the radiation of the first wavelengths and the radiation of the second wavelengths have passed through the diesel exhaust fluid in the sample cell region; a database of properties of diesel exhaust fluid in an unused state; and a processor for receiving an output of the spectrometer, processing the output to determine properties of the diesel exhaust fluid being analyzed, and comparing the properties of the diesel exhaust fluid being analyzed to properties of the diesel exhaust fluid in an unused state in the database.