Patent ID: 6948373

Claim:
An inline pressure sensor comprising: a housing having first to third liquid member flow paths formed by piping sections; a pressure sensing section disposed in the housing for contacting a liquid member flowing in the flow paths; a sensor element disposed in the housing for measuring a stress by contacting the pressure sensing section; a pair of coupling ports disposed on both ends of the housing and connected to the flow paths, one of the flow paths in the coupling ports and one of the flow paths in the piping section being aligned; the first liquid member flow path being for switching a direction of the liquid member from the aligned flow path to the pressure sensing section; the second liquid member flow path being for flowing the liquid member along the pressure sensing section; and the third liquid member flow path being for switching a direction of the liquid member from the pressure sensing section to the aligned flow path, wherein the first liquid member flow path, the second liquid member flow path, and the third liquid member flow path are connected in an approximate convex alignment viewed in a cross section, the second liquid member flow path being formed such that a distance between a pressure sensing surface on the pressure sensing section and a surface of the housing facing the pressure sensing section is less than an inner diameter of the flow path, and the second flow path having a round shape viewed horizontally.