Carbon dioxide sensor and associated method for generating a gas measurement value

US8683845B2 · kind B2 · utility

Assignee

• Siemens Aktiengesellschaft · DE

Inventors

• Maximilian Fleischer · Ehrenkirchen, DE
• Roland Pohle · Füssen, DE
• Stefan Stegmeier · Munich, DE

Key dates

• Filing date: Dec 14, 2010
• Grant date: Apr 1, 2014
• Expiry date: May 25, 2032

Classification

• Technology area (CPC G): Physics
• CPC primary: G01N33/006
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

A gas sensor detects carbon dioxide, for example for use in air-conditioning systems. The gas sensor is based on a field effect transistor construction. It has a polymer-based material sensitive to carbon dioxide as gas-sensitive layer. The material has a cross-sensitivity with respect to air humidity. The influence of humidity is compensated for by using the signal of a humidity sensor.