SENSOR APPARATUS WITH O-RING

摘要

A sensor apparatus including a detecting element integrated in a case formed of a synthetic resin material, an O-ring fitted into an annular depression provided on the case, and an O-ring fitting ring member that is formed separately from the case and that is insert-molded in the case, wherein a bottom surface of the annular depression is formed by an outer peripheral surface of the O-ring fitting ring member exposed to an outer surface of the case.