VTT has designed and manufactured a MEMS FPI based carbon dioxide sensor demonstrator which is integrated to a cell phone shield cover. The demonstrator contains light source, gas cell, MEMS FPI, detector, control electronics and two coin cell batteries as a power source. It is connected to the cell phone by Bluetooth. By adjusting the wavelength range and customizing the MEMS FPI structure, it is possible to selectively sense multiple gases.
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Rami Mannila, Risto Hyypiö, Marko Korkalainen, Martti Blomberg, Hannu Kattelus, Anna Rissanen, "Gas detection with microelectromechanical Fabry-Perot interferometer technology in cell phone," Proc. SPIE 9482, Next-Generation Spectroscopic Technologies VIII, 94820P (3 June 2015);