Abstract: A liquid separator removing a liquid from a sample of a breathing gas flowing through an airway adapter having a channel surrounded by a wall is disclosed herein. The separator includes a chamber receiving the sample, and a membrane having an outer surface exposed to the gas flow, the membrane at least partially surrounding the chamber, which membrane separates the liquid received by the chamber. The separator also includes a supporting structure for supporting the membrane, and a connector operationally attached to the supporting structure, the connector being connectable to the adapter. The connector comprises a cavity providing a flow path for the sample from the chamber through an opening of the cavity to a sample tube. The membrane branches from a central part of the channel into at least two different branches extending to different directions.

Abstract: An airway adapter comprising a flow channel configured to carry a respiratory gas, and a body comprising a surface at least partially coated with a luminophore that is excited by received radiation, wherein the luminophore emits luminescent radiation indicative of oxygen concentration of the respiratory gas when the luminophore is in contact with the respiratory gas, wherein the body comprises a transparent radiation path surrounded by the surface, the body being configured to guide at least one of the received radiation and the luminescent radiation emitted by the luminophore.

Abstract: A liquid separator removing a liquid from a sample of a breathing gas flowing through an airway adapter having a channel surrounded by a wall is disclosed herein. The separator includes a chamber receiving the sample, and a membrane having an outer surface exposed to the gas flow, the membrane at least partially surrounding the chamber, which membrane separates the liquid received by the chamber. The separator also includes a supporting structure for supporting the membrane, and a connector operationally attached to the supporting structure, the connector being connectable to the adapter. The connector comprises a cavity providing a flow path for the sample from the chamber through an opening of the cavity to a sample tube. The membrane branches from a central part of the channel into at least two different branches extending to different directions.

Abstract: An airway adapter comprising a flow channel configured to carry a respiratory gas, and a body comprising a surface at least partially coated with a luminophore that is excited by received radiation, wherein the luminophore emits luminescent radiation indicative of oxygen concentration of the respiratory gas when the luminophore is in contact with the respiratory gas, wherein the body comprises a transparent radiation path surrounded by the surface, the body being configured to guide at least one of the received radiation and the luminescent radiation emitted by the luminophore.

Abstract: An arrangement for improving an accuracy of a pressure measurement made of a breathing gas including drops of water or humidity flowing along a flow channel is disclosed herein. The arrangement includes at least one pressure measuring channel to transmit a pressure of the breathing gas flowing along the flow channel to a measuring device to make the pressure measurement. The pressure measuring channel is equipped with a capillary material enabling capillary suctioning of water. Also a flow sensor for a flow rate measurement of a breathing gas including drops of water or humidity is provided.

Abstract: An arrangement for improving an accuracy of a pressure measurement made of a breathing gas including drops of water or humidity flowing along a flow channel is disclosed herein. The arrangement includes at least one pressure measuring channel to transmit a pressure of the breathing gas flowing along the flow channel to a measuring device to make the pressure measurement. The pressure measuring channel is equipped with a capillary material enabling capillary suctioning of water. Also a flow sensor for a flow rate measurement of a breathing gas including drops of water or humidity is provided.

Abstract: The invention concerns a gas analyzer, which comprises: an electromagnet that has an air gap; a power source for supplying cyclically variable electrical current/voltage to said electromagnet; a sample gas conduit and a reference gas conduit opening into said air gap; an exit conduit communicating with said air gap for removing the intermixed sample and reference gases; pressure detecting microphone or microphones connected to said sample gas conduit and to said reference gas conduit for sensing gas pressures at a first acoustic measuring frequency in the respective conduits giving at least one acoustic pressure signal component; and electronics connected to said microphone(s) to receive said acoustic pressure signal component or components to form at least a first intermediate output signal describing content of a paramagnetic gas component in the sample gas.

Abstract: Liquid separator for a gas analyzer and method for separating a liquid component from gas. The liquid separator comprises an input passage having an input end and an output end, an output passage having an input end and an output end, a wall formed of a gas permeable and liquid impermeable material separating the input passage and the output passage, means for introducing a gas sample containing liquid through the input end into the input passage with a first portion of the gas passing through said wall to the output passage and a second portion of the gas and the liquid remaining in the input passage, a vacuum means for flowing the first portion of the gas through the output end from the output passage to a measuring unit, a first conduit connecting the output end of the input passage and for conducting the second portion of the gas and the liquid furtheron with vacuum means.

Abstract: The invention concerns a gas analyzer, which comprises: an electromagnet that has an air gap; a power source for supplying cyclically variable electrical current/voltage to said electromagnet; a sample gas conduit and a reference gas conduit opening into said air gap; an exit conduit communicating with said air gap for removing the intermixed sample and reference gases; pressure detecting microphone or microphones connected to said sample gas conduit and to said reference gas conduit for sensing gas pressures at a first acoustic measuring frequency in the respective conduits for giving at least one acoustic pressure signal component; and electronics connected to said microphone(s) to receive said acoustic pressure signal component or components to form at least a first intermediate output signal describing content of a paramagnetic gas component in the sample gas.

Abstract: A non-dispersive infrared measuring arrangement for a multigas analyzer is described having a radiation source (10), a measuring chamber (20), a beam splitter (3), at least a first and a second detector unit (21, 22) both with at least two detectors (1a, 1b; 2a, 2b); and optical filters in radiation beam portions ending in said detectors. The detector units receive the reflected beam portions (RR) and the transmitted beam portion (RT). Both the first and second detector units (21, 22) have: at least one measuring detectors (1a, 1b) provided with an optical measurement filter (5a, 5b); and at least one reference detectors (2a, 2b) provided with an optical reference filter (6a, 6b). Alternatively, the first detector unit (21) has at least two measuring detectors (1a, 1b) each provided with an optical measurement filter (5a, 5b), and the second detector unit (22) has at least two reference detectors (2a, 2b) each provided with an optical reference filter (6a, 6b).

Abstract: The invention concerns a gas analyzer comprising: a measuring volume (2), a radiation source (1) for providing a beam to pass said measuring volume; a heat sink (16) for said radiation source; at least one thermal detector (3) having a hot junction within a support structure and receiving the radiation and a cold junction for reference within the same support structure and protected from said radiation; at least one optical bandpass filter (9) between said hot junction and said radiation source; and a thermal mass (11), which is formed of a material having high thermal conductance. The thermal mass has a cavity with a bottom step (34) and a rim (32), and a first length therebetween. The support structure has a frontal edge (35) and a base plate lip (33), and a second length therebetween. There is a radial gap between the thermal mass and the support structure.

Abstract: The invention concerns a gas analyzer comprising: a measuring volume (2), a radiation source (1) for providing a beam to pass said measuring volume; a heat sink (16) for said radiation source; at least one thermal detector (3) having a hot junction within a support structure and receiving the radiation and a cold junction for reference within the same support structure and protected from said radiation; at least one optical bandpass filter (9) between said hot junction and said radiation source; and a thermal mass (11), which is formed of a material having high thermal conductance. The thermal mass has a cavity with a bottom step (34) and a rim (32), and a first length therebetween. The support structure has a frontal edge (35) and a base plate lip (33), and a second length therebetween. There is a radial gap between the thermal mass and the support structure.

Abstract: Liquid separator for a gas analyzer and method for separating a liquid component from gas. The liquid separator comprises an input passage having an input end and an output end, an output passage having an input end and an output end, a wall formed of a gas permeable and liquid impermeable material separating the input passage and the output passage, means for introducing a gas sample containing liquid through the input end into the input passage with a first portion of the gas passing through said wall to the output passage and a second portion of the gas and the liquid remaining in the input passage, a vacuum means for flowing the first portion of the gas through the output end from the output passage to a measuring unit, a first conduit connecting the output end of the input passage and for conducting the second portion of the gas and the liquid furtheron with vacuum means.

Abstract: A non-dispersive infrared measuring arrangement for a multigas analyzer is described having a radiation source (10), a measuring chamber (20), a beam splitter (3), at least a first and a second detector unit (21, 22) both with at least two detectors (1a, 1b; 2a, 2b); and optical filters in radiation beam portions ending in said detectors. The detector units receive the reflected beam portions (RR) and the transmitted beam portion (RT). Both the first and second detector units (21, 22) have: at least one measuring detectors (1a, 1b) provided with an optical measurement filter (5a, 5b); and at least one reference detectors (2a, 2b) provided with an optical reference filter (6a, 6b). Alternatively, the first detector unit (21) has at least two measuring detectors (1a, 1b) each provided with an optical measurement filter (5a, 5b), and the second detector unit (22) has at least two reference detectors (2a, 2b) each provided with an optical reference filter (6a, 6b).

Abstract: This invention relates a chemiluminescent gas analyzer for determining a concentration of a gaseous component (G1) in a sample gas mixture (2). The analyzer comprises a measuring chamber (3), an ozonizer (4) with ozone generating devices (44) for producing ozone-containing gas (G2), input conduits (24, 23) for delivering the ozone-containing gas and said gas mixture into the chamber and an outlet (18). A detector (7) receives radiation (E) emitted as a consequence of a reaction between the gaseous component and the ozone-containing gas. Said analyzer further comprises a flow delay device (41) in or upstream the input conduit for said ozone-containing gas and downstream from the ozone generating devices (44) of the ozonizer. The flow delay device has a delay volume (VD) causing a predetermined delay time (T) for the flow of the ozone-containing gas from said ozonizer to said measuring chamber (3).

Abstract: The invention relates to a gas analyzer comprising a measuring volume (6) for a sample gas mixture (G), a radiation source (1) for providing a beam (20) of electromagnetic radiation to pass said measuring volume, a heat sink (4) for said radiation source, at least one thermopile detector (9), at least one optical bandpass filter (10), electrical contact pins (12) for signal(s) in the housing of said detector, a thermal mass formed of a material having high thermal conductance. Said thermal mass has a cavity (21) and an outer surface (22), surrounding at least said detector housing in the cavity, being in contact with said detector housing, and extending towards the radiation source. There is a thermal barrier between the heat sink (4) and the thermal mass (8, 16). The gas analyzer further comprises electrical wires (15), which are composed of materials and having dimensions producing an overall thermal conductance substantially lower than that of said electrical contact pins.

Abstract: The invention relates to a geometrical beam splitter, e.g. in a sensor, for transversally dividing a radiation beam (4) into at least one reflected beam portion (5R) and at least one passing beam portion (5T). The beam splitter (1) is composed of a piece (11) of rigid material having a non-transparent reflective surface (3) at an angle (&agr;) deviating from the right angle in respect to the incident direction (RI) of said radiation beam. The beam splitter has a width (W) and a height (H) extending over a total effective cross-sectional area (A*) of the radiation beam (4) and e.g. two holes (2a, 2b) extending through said piece of rigid material. The holes allow passing of at least two beam portions (5T), and simultaneously the non-transparent reflective surface divert at least one reflected beam portion (5R) so that said beam portions have substantially similar wavelength distributions.

Abstract: The invention relates to a gas analyzer comprising a measuring volume (6) for a sample gas mixture (G), a radiation source (1) for providing a beam (20) of electromagnetic radiation to pass said measuring volume, a heat sink (4) for said radiation source, at least one thermopile detector (9), at least one optical bandpass filter (10), electrical contact pins (12) for signal(s) in the housing of said detector, a thermal mass formed of a material having high thermal conductance. Said thermal mass has a cavity (21) and an outer surface (22), surrounding at least said detector housing in the cavity, being in contact with said detector housing, and extending towards the radiation source. There is a thermal barrier between the heat sink (4) and the thermal mass (8, 16). The gas analyzer further comprises electrical wires (15), which are composed of materials and having dimensions producing an overall thermal conductance substantially lower than that of said electrical contact pins.

Abstract: The invention relates to a geometrical beam splitter, e.g. in a sensor, for transversally dividing a radiation beam (4) into at least one reflected beam portion (5R) and at least one passing beam portion (5T). The beam splitter (1) is composed of a piece (11) of rigid material having a non-transparent reflective surface (3) at an angle (&agr;) deviating from the right angle in respect to the incident direction (RI) of said radiation beam. The beam splitter has a width (W) and a height (H) extending over a total effective cross-sectional area (A*) of the radiation beam (4) and e.g. two holes (2a, 2b) extending through said piece of rigid material. The holes allow passing of at least two beam portions (5T), and simultaneously the nontransparent reflective surface divert at least one reflected beam portion (5R) so that said beam portions have substantially similar wavelength distributions.

Abstract: This invention relates a chemiluminescent gas analyzer for determining a concentration of a gaseous component (G1) in a sample gas mixture (2). The analyzer comprises a measuring chamber (3), an ozonizer (4) with ozone generating means (44) for producing ozone-containing gas (G2), input conduits (24, 23) for delivering the ozone-containing gas and said gas mixture into the chamber and an outlet (18). A detector (7) receives radiation (E) emitted as a consequence of a reaction between the gaseous component and the ozone-containing gas. Said analyzer further comprises a flow delay device (41) in or upstream the input conduit for said ozone-containing gas and downstream from the ozone generating means (44) of the ozonizer. The flow delay device has a delay volume (VD) causing a predetermined delay time (T) for the flow of the ozone-containing gas from said ozonizer to said measuring chamber (3).