Gas sensor and method for determining a gas concentration in a binary mixture

摘要

The sensor has a measurement cell (1) intended to be located in a two-component mixture including a membrane (12) of low thermal inertia on which heating units i.e. heating devices (13), for the membrane are arranged. A source of alternating current of frequency is intended to supply the heating units and an electronic circuit, where the frequency is selected to calculate value of concentration of the gas and the pressure of mixture from parameters with the assistance of established mathematical function and characteristic coefficients of the sensor. An independent claim is also included for a method for determining concentration of gas in a two-component mixture at variable pressure.