Device for measuring the concentration of paramagnetic gases

US8596109B2 · kind B2 · utility

Assignee

• Dräger Medical GmbH · DE

Inventors

• Hartmut Stark · Stockelsdorf, DE
• Peter Dreyer · Bad Schwartau, DE
• Alfred Kelm · Badendorf, DE
• Ralf Doring · Heiligenhaus, DE
• Günter Steinert · Ondernemingsweg, DZ

Key dates

• Filing date: Feb 3, 2011
• Grant date: Dec 3, 2013
• Expiry date: Sep 21, 2031

Classification

• Technology area (CPC G): Physics
• CPC primary: G01N33/497
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

A device for measuring the concentrations of paramagnetic gases in a gas sample has at least one modulatable magnetic flux source, which has an air gap, to which a gas sample can be fed. A controllable power source, for generating current and voltage signals, is coupled with the modulatable magnetic flux source in order to generate a modulatable magnetic flux within the air gap. Two measuring points are arranged at least partly within the air gap. Each measuring point has an electrically controllable heating device and a heat conduction-measuring unit or resistive measuring device. Each measuring point is coupled with a variable power source to heat the heating device to a working temperature. Each measuring point is coupled with a measuring circuit to measure heat conduction measured signals generated by the heat conduction-measuring unit, from which the concentrations of paramagnetic gases, which are contained in the gas sample, can be derived.