Abstract: A sensor and method for measuring respiratory gas properties are presented. A thermal conductivity sensor is used to measure the thermal conductivity of a gas with unknown composition and/or mass flow rate at different temperatures. The measured thermal conductivities at different temperatures are compared with known thermal conductivities of gases at different temperatures. In an exemplary application the sensor and method are installed in a tube to determine a mass of respiratory air flowing through the tube and a concentration of CO2 therein.
Type:
Grant
Filed:
June 30, 2017
Date of Patent:
December 1, 2020
Assignee:
Sendsor GmbH
Inventors:
Dieter Helmut Dill, Matthias Maurberger, Alexander Scholz
Abstract: The invention relates to a spirometer for measuring pulmonary respiration of a test subject, comprising a body and a sensor unit, wherein the sensor unit can be interchanged with further sensor units. In a corresponding method, such a spirometer is operated with a sensor unit and the sensor unit is subsequently interchangeably replaced by a further sensor unit.
Abstract: The invention relates to a spirometer for measuring pulmonary respiration of a test subject, comprising a body and a sensor unit, wherein the sensor unit can be interchanged with further sensor units. In a corresponding method, such a spirometer is operated with a sensor unit and the sensor unit is subsequently interchangeably replaced by a further sensor unit.