Yokogawa Electric Corporation

Yokogawa Corporation of America

Alan Cowie

Jie Zhu

Minoru Maeda

Tadashi Sugiyama

Takaaki Hirata

Naoyuki Fujimura

Nobuhiko Kanbara

Yasuhiko Mitsumoto

Masaya Ooyama

Junichi Matsuo

Trevor S Knittel

Donald L Wyatt

Trevor Knittel

Donald Wyatt

A laser gas analyzer includes a wavelength-variable laser having a wide wavelength-variable width, a light-split module configured to split an output light of the wavelength-variable laser into a measurement light and a reference light, a first gas cell into which gases to be measured are introduced, and the measurement light is made to be incident, and a data processor configured to obtain an absorption spectrum of each of the gases to be measured based on a reference signal related to the reference light and an absorption signal related to an output light of the first gas cell, and to obtain concentrations of the respective gases to be measured.

Laser gas analyzer

An alignment unit for a laser analyzer that performs measurements on a substance inside a chamber includes a first alignment flange that attaches to the chamber, a second alignment flange that attaches one of a launch unit or detect unit of the laser analyzer to the chamber, an alignment stud for adjusting horizontal and vertical alignment of the second alignment flange, an optical window that keeps the chamber closed when the one of the launch unit or detect unit is removed from the chamber, and a sealing member provided between the second alignment flange and the optical window.

Alignment flange mounted optical window for a laser gas analyzer

A chemical analysis method for determining the concentration of carbon monoxide, gaseous water and gaseous hydrocarbon in a combustion gas. The method includes the following steps: (a) directing wavelength modulated light from a single tunable diode laser at a wavelength in the range of from 2 to 2.5 micrometers through the combustion gas to a light detector to produce an absorption profile of the combustion gas (b) digitizing the adsorption profile of the combustion gas; (c) storing the digitized adsorption profile in a digital computer; (d) processing the digitized adsorption profile in the digital computer to produce an output from the computer indicative of the concentration of carbon monoxide, gaseous water and gaseous hydrocarbon in the combustion gas.

Combustion gas analysis

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Friendswood, TX, United States of America

Alan Cowie