Sensor for the selective detection of ammonia in no.sub.X -containing, oxygen-rich gases

US6069013A · kind A · utility

Assignee

• Dornier GmbH · DE

Inventors

• Carsten Plog · Markdorf, DE
• Werner Maunz · Markdorf, DE
• Ralf Mueller · Aulendorf, DE

Key dates

• Filing date: Feb 2, 1998
• Grant date: May 30, 2000
• Expiry date: Feb 2, 2018

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T436/175383
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

A sensor for selective detection of ammonia in high-oxygen, NO.sub.x -containing gas. The sensor has a component part acting as the capacitor, and a gas-permeable sensitive layer as the dielectric, the sensitive layer being a hydrophobic, precious-metal-free zeolite of low acidity which has an ordered crystalline structure of primary-pores whose diameter is of the magnitude of the gas-kinetic diameter of NH.sub.3.