Gas sensor for detecting concentration of specific gas component e.g. oxygen, in exhaust gas system of internal combustion engine of automobile, has compression device with fixing spring units pressing inner wall surfaces of insulator

摘要

The gas sensor (1) has multiple contact fitting pieces (2), where each has a base plate (21) arranged for contacting an inner wall surface (140) of an atmospheric-sided insulator (14), and an electrode contact unit (22) arranged for each of electrodes (120). A compression device compresses such that the contact fitting pieces displaces in directions, which intersects in a longitudinal direction, relative to the electrodes. The compression device has fixing spring units (23) that are secured and arranged with the contact fitting pieces for pressing the inner wall surfaces of the insulator.