Gas sensor for measuring a concentration of an analysis gas

A gas sensor for measuring a concentration of an analysis gas based on a thermal conductivity principle, the gas sensor comprising:

• at least one analysis heating element situated on a first diaphragm configured to heat the analysis gas;
• a reference heating element situated on a second diaphragm configured to heat a reference gas;
• at least one evaluation electronics unit configured to measure a resistance change of the analysis heating element caused by the analysis gas in relation to an electrical resistance of the reference heating element;
• wherein the first diaphragm and the second diaphragm are situated adjacent to one another in a sensor substrate of the gas sensor, due to a base substrate situated on one side at the sensor substrate, a measuring volume being formable between the first diaphragm and the base substrate and a reference volume being formable between the second diaphragm and the base substrate, the reference volume being fluidically connected to an adjacent surroundings via an opening in the second diaphragm.