Glow Plug with a pressure sensor for a diesel engine

Diesel motor glow plug has a heating rod (1) mounted in the body (2.1, 2.2) of the glow plug so that it can slide axially due to pressure changes in the combustion chamber. The rod is held by a membrane (7) and or seals (3), which mean that it can be axially displaced so that it transmits a pressure to a pressure sensor.