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;
• 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.

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.