公开(公告)号：US20210164895A1

公开(公告)日：2021-06-03

申请号：US17119472

申请日：2020-12-11

Applicant: GasSecure AS

Inventor： Håkon SAGBERG ,  Britta GRENNBERG FISMEN ,  Kari Anne HESTNES BAKKE ,  Jon TSCHUDI ,  Ib-Rune JOHANSEN ,  Knut Baeroe SANDVEN

IPC: G01N21/3504 ,  G01N21/31 ,  G01R27/26

Abstract: A gas sensor for measuring concentration of a predetermined gas includes a light source (2) arranged to emit pulses of light, a measurement volume (10), a detector (4) arranged to receive light that has passed through the measurement volume (10), and an adaptable filter (6) disposed between the light source (2) and the detector (4). 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.

公开(公告)号：US20180202920A1

公开(公告)日：2018-07-19

申请号：US15737243

申请日：2016-06-16

Applicant: GASSECURE AS

Inventor： Lars BORGEN ,  Britta FISMEN ,  Thor Christian HOBÆK ,  Håkon SAGBERG

IPC: G01N21/15 ,  G01N21/3504

Abstract: A gas sensing apparatus (48) comprises a gas sensor arranged to use light to sense presence of a gas; an optical element (12, 40) arranged so that said light impinges thereon; and a thermoelectric heat pump (2, 24) having a cold side (6, 36) and a hot side (8, 34). The thermoelectric heat pump (2, 24) is configured to transfer heat energy from said cold side (6, 36) to said hot side (8, 34) in response to a supply of electrical energy provided to the thermoelectric heat pump (2, 24). The hot side (8, 34) of the thermoelectric heat pump (2, 24) is in thermal contact with the optical element (12, 40).