Gas sensor device and installation structure for a gas sensor device

For providing a gas sensor device, the clogging of a gas suction port by particles, droplets o. A. a gas and obtaining the measurement accuracy over a long period comprising the gas sensor device 1 has a housing 3. The housing 3 comprises an expansion chamber 6, which is connected via an air suction port 8 to an intake air passage 2, and a measuring chamber 5 through a connecting part 7 with the is connected to the expansion chamber. 6 A double-compressive structure comprising the gas suction port 8 and the connecting part 7 is provided, and two stages of areas are provided between the gas suction port 8 and the measuring chamber 5, in which the volume expands. This increases the movement of air into the measuring chamber. 5 There may be a structure are provided in which the capacity of the gas suction port 8 is reduced to prevent clogging of the gas suction port is prevented by particles or droplets.