Dräger Safety Ag&co. Kgaa

Sinvent as

Britta Grennberg Fismen

Ib-Rune Johansen

Dag Thorstein Wang

Håkon Sagberg

Jon Tschudi

Ralph W Bernstein

Alain Ferber

Henrik Rogne

Knut Sandven

Berit Sundby Avset

Kari Anne Hestnes Bakke

Hakon Sagberg

Knut Baeroe Sandven

A gas sensor for measuring concentration of a predetermined gas includes a light source () arranged to emit pulses of light, a measurement volume (), a detector () arranged to receive light that has passed through the measurement volume (), and an adaptable filter () disposed between the light source () and the detector (). The gas sensor has a measurement state in which it passes at least one wavelength band which is absorbed by the gas and a reference state in which said wavelength band is attenuated relative to the measurement state. A controller is connected to each of the light source, the detector and the adaptable filter to change the adaptable filter between one of said measurement state and said reference state to the other at least once during a gas sensor operation period.

Gas sensors

Growing community of inventors

Oslo, Norway

Britta Grennberg Fismen