Sensor for determining concentration of gas

摘要

An optical sensor unit (10) for measuring a concentration of a gas is provided, comprising at least one sensing layer (122) adapted to be irradiated with a predetermined radiation; at least one gas-permeable layer (121) adjacent to one side of the at least one sensing layer (122) and adapted to pass gas which concentration is to be measured through the gas-permeable layer (121) towards the sensing layer (122); a removable protective layer (150) covering at least the gas-permeable layer (121) and adapted to be removed before use of the optical sensor unit (10), wherein the optical sensor unit (10) is adapted to measure an optical response of the at least one sensing layer (122), which optical response depends on the concentration of the gas.

主权项

1. Optical sensor unit for measuring a concentration of a gas, comprising:
a first gas-permeable layer adjacent to a first side of at least one sensing layer and adapted to pass gas which concentration is to be measured through the first gas-permeable layer towards the at least one sensing layer; the at least one sensing layer adapted to be irradiated with a predetermined radiation and to emit a corresponding optical response, wherein the optical response depends on the concentration of the gas; a fluid film or a contact medium interposed between the first gas-permeable layer and a second gas-permeable layer, the fluid film or the contact medium being on a side of the first gas-permeable layer that is opposite the at least one sensing layer, a removable protective layer covering at least the second gas-permeable layer and adapted to be removed before use of the optical sensor unit; an adhesive layer interposed between the removable protective layer and a structure supporting at least the at least one sensing layer and/or the first gas-permeable layer; and the second gas-permeable layer interposed between the removable protective layer and the fluid film or the contact medium, wherein the first gas-permeable layer and the second gas-permeable layer confine at least part of the fluid film or the contact medium there-between.