Combustion pressure sensor

摘要

The present invention provides a glow plug with combustion pressure sensor (100) having a plug body (220) having a screw portion (201a) on the outer peripheral surface that is inserted into a screw hole (1b) of an engine head (1) and screw-connected to it, a combustion pressure sensor (31) fixed to the plug body (220) to which the plug body (220) is inserted, and a lead wire (500) for leading out the sensor signal connected to the sensor (31), wherein the outside diameter of a hexagonal portion (221) used for screw connection between the plug body (220) and the screw hole (1b) out of the plug body (220) is smaller than the inside diameter of a through hole (31a) of the combustion pressure sensor (31) so that the plug body (220) can be inserted into the combustion pressure sensor (31) from the hexagonal portion (221) end.