Patent Number: 6,166,383

Title: Non-dispersive infrared gas analyzer

Abstract: A non-dispersive infrared gas analyzer for determining concentrations of carbon dioxide and/or carbon monoxide, hydrocarbons, and nitrogen oxides has two measuring cells 4, 6 consecutively traversed by a beam, with an optopneumatic detector 22 for carbon dioxide and an optopneumatic detector 23 for carbon monoxide arranged between them. Detectors 7, 8 for hydrocarbons and nitrogen oxides are arranged on the measuring cell 6 located downstream from detectors 22, 23 in the direction of the beam.

Inventors: Kimmig; Ludwig (Ettlingen, DE), Krause; Peter (Karlsruhe, DE), Ludwig; Michael (Karlsruhe, DE), Schmidt; Karlheinz (Eggenstein-Leopoldshafen, DE)

Assignee: Siemens AG

International Classification: G01N 21/37 (20060101); G01N 21/03 (20060101); G01N 21/31 (20060101); G01N 21/59 (20060101); G01N 21/61 (20060101); G01J 5/08 (20060101); G01J 005/08 (); G01N 021/61 ()

Expiration Date: 12/26/2017