Gas cell for the optical analysis of gases

US9279721B2 · kind B2 · utility

Assignee

• Bruker Optik GmbH · DE

Inventors

• Sven Krause · Hamburg, DE
• Yifei Wang · Pomona, US
• Lars Schomann · Hamburg, DE
• Gerhard Matz · Kürten, DE
• Roland Harig · Waldbronn, DE
• Jens Eichmann · Bad Oldesloe, DE

Key dates

• Filing date: Mar 4, 2015
• Grant date: Mar 8, 2016
• Expiry date: Mar 4, 2035

Classification

• Technology area (CPC G): Physics
• CPC primary: G01N2201/02
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

A measuring cell for a gas analysis spectrometer has an inner chamber for a sample gas to be analyzed and an inlet and an outlet which are connected thereto. A traversing optical path for a measuring beam is formed in the inner chamber. The measuring cell is tubular, the inlet and the outlet are arranged at opposite ends, and the inner chamber of the measuring cell has a cross-sectional shape that is monotonic over the length of the tube and which has an oval-shape at the start, which disappears toward the end. That special shape results in fast gas exchange and thus high dynamics, even with larger measuring cells, which have high sensitivity due to the long optical paths thereof. Two characteristics which until now appeared to be conflicting are thereby combined.