Abstract: A device for non-invasively determining existence of a gas component of interest inside a determination space of a glass unit comprises a laser beam emitting unit comprising a laser source for emitting laser beam towards said measuring space and detecting unit comprising a detector for detecting transmission of said emitted laser beams traveled through said space. The device is configured to measure in a calibration mode locations of at least one reference peak of at least same gas component as to the determined inside the determination space. The emitted laser beam is configured to travel through a calibration space having at least the gas component of interest, and the detecting means is configured essentially to detect or image said beam transmitted through said calibration space.

Abstract: A device for non-invasively determining existence of a gas component of interest inside a determination space of a glass unit comprises a laser beam emitting unit comprising a laser source for emitting laser beam towards said measuring space and detecting unit comprising a detector for detecting transmission of said emitted laser beams travelled through said space. The device is configured to measure in a calibration mode locations of at least one reference peak of at least same gas component as to the determined inside the determination space. The emitted laser beam is configured to travel through a calibration space having at least the gas component of interest, and the detecting means is configured essentially to detect or image said beam transmitted through said calibration space.

Abstract: A device for determining existence of a gas component inside a space of a glass unit includes detecting unit and calibration units. The detecting unit includes laser beam emitting elements emitting laser beam towards the space and detecting elements for detecting reflections of emitted laser beams. The calibration unit includes a calibration chamber having the same gas component as inside the space, and a reflector. The laser beam emitting and detecting elements are arranged to emit and receive beams at an angle so that the focus of the laser spot locates between the laser emitting and detecting elements and outside the line connecting them at the same position in relation to the detecting unit during the measuring process. The detecting and calibration units are movable in relation to each other for calibration purpose so that the laser beam travels through the chamber and the focus spot hits the reflector.

Abstract: A device for determining existence of a gas component inside a space of a glass unit includes detecting unit and calibration units. The detecting unit includes laser beam emitting elements emitting laser beam towards the space and detecting elements for detecting reflections of emitted laser beams. The calibration unit includes a calibration chamber having the same gas component as inside the space, and a reflector. The laser beam emitting and detecting elements are arranged to emit and receive beams at an angle so that the focus of the laser spot locates between the laser emitting and detecting elements and outside the line connecting them at the same position in relation to the detecting unit during the measuring process. The detecting and calibration units are movable in relation to each other for calibration purpose so that the laser beam travels through the chamber and the focus spot hits the reflector.