Gas sensor for determining oxygen concentration of exhaust gas in internal combustion engine, has heating element producing heat zone with heat focal point, where heat focal point is shielded with respect to measuring gas flow

摘要

The gas sensor has a sensor element (12) with a gas entry hole and a heating element in an end section (121) that is gas-sensitively exposed to a measuring gas flow. The heating element produces a heat zone with a heat focal point that is axially displaced to the gas entry hole. The heat focal point is shielded with respect to the measuring gas flow. A screen is between the gas entry hole and the heat focal point. The sensor element is fixed to a sensor housing (11) above the end section by a sealing member (13).