To prevent contamination from depositing on a site where a pressure introduction part is sealed immediately before connecting to the counter member in a pressure sensor that assembles the pressure introduction part for introducing pressure to a sensor element part while the pressure introduction part is sealed to the counter member that is a body to be detected for fixing.
A pressure sensor 100 is equipped with an introduction path 1b that introduces pressure to a sensor element part 4 for detecting pressure, and at the same time a pressure introduction part 1a that can be connected to the counter member. On the outer wall of the pressure introduction part 1a, an O ring 14 for sealing in the connection with the counter member is provided, and an O ring fixing part is covered with a removable protection cap 15 in advance for protecting before shifting to connection operation with the counter member. The introduction path 1b is connected to the outside by an opening 15a of the protection cap 15, and pressure characteristics can be inspected while the protection cap 15 is provided.
IMAI MASATO
BABA HIRONOBU
HAYASHI MICHITAKA
