Determining Biogenic Content of Biogas by Measuring Stable Isotopologues 12CH4, 13CH4, and CH3D with a Mid-Infrared Direct Absorption Laser Spectrometer

by Teemu Kääriäinen, Craig A. Richmond, Albert Manninen
Published 2018-02-01

Active Hyperspectral Sensor Based on MEMS Fabry-Pérot Interferometer

by Teemu Kääriäinen, Priit Jaanson, Aigar Vaigu, Rami Mannila, Albert Manninen
Published 2019-05-01

Transversely Excited Multipass Photoacoustic Cell Using Electromechanical Film as Microphone

by Jaakko Saarela, Johan Sand, Tapio Sorvajärvi, Albert Manninen, Juha Toivonen
Published 2010-05-01