Pressure sensor, measuring device, reaction carrier and measuring method

A measuring device for a measuring system for measuring a concentration of gaseous and/or aerosol components of a gas mixture, the measuring device comprising:

• a reaction carrier, which has at least one flow channel, wherein the flow channel forms a reaction chamber with a reactant, which is configured to enter into an optically detectable reaction with a component to be measured in the gas mixture or with a reaction product of the component to be measured;
• a gas port assembly unit for connecting a gas inlet channel and a gas outlet channel to the flow channel of the reaction carrier;
• a gas delivery device for delivering the gas mixture through the flow channel of the reaction carrier;
• an optical sensor;
• and
• a pressure sensor provided at the gas port assembly unit, the pressure sensor comprising an elastic element configured to undergo deformation as a function of the pressure difference, the pressure sensor being configured to detect a pressure difference of a gas mixture flowing at least one of through the gas delivery assembly unit and the flow channel of the reaction carrier, wherein the pressure sensor further comprises an optical display element, which comprises the elastic element, the optical sensor being configured to detect simultaneously the optical display element and the optically detectable reaction.

A measuring method for a measuring system for measuring a concentration of gaseous and/or aerosol components of a gas mixture with a reaction carrier, which has at least one flow channel, wherein the flow channel forms a reaction chamber with a reactant, which is configured to enter into an optically detectable reaction with at least one component to be measured in the gas mixture or with a reaction product of the component to be measured, and with a measuring device, the method comprising the steps of:

• measuring a reference pressure difference in a gas port assembly unit of the measuring device or in a flow channel of the reaction carrier against the ambient pressure or over a restriction in the flow;
• and
• delivering a gas flow through the flow channel of the reaction carrier;
• measuring a pressure difference in a gas port assembly unit of the measuring device or in a flow channel of the reaction carrier against the ambient pressure or over a restriction in the flow via a pressure sensor, wherein the pressure sensor comprises an elastic element and an optical display element, the optical display element comprising the elastic element, wherein the optical display element is configured to be detected by an optical sensor of the measuring device, wherein the optical display element is formed and arranged to be simultaneously detected with the optically detectable reaction by the optical sensor.