Pressure transmitter

A pressure transmitter, comprising:

• a coupling portion configured to be inserted into a pipe through which a target fluid, which is a target of a pressure measurement, flows, and disposed to be partially contactable with the target fluid;
• a first pressure chamber connected to the coupling portion, extending in a direction away from the target fluid, and provided therein with a first measuring space in which one side thereof is opened toward the coupling portion;
• a second pressure chamber connected to the coupling portion, extending in a direction away from the target fluid, and provided therein with a second measuring space in which one side thereof is opened toward the coupling portion;
• a first flexible member;
• a second flexible member;
• and
• pressure transmitting fluids;
• wherein the coupling portion is provided with:
• a first connecting space, in which one end thereof is opened toward the target fluid and another end thereof communicates with the opened one side of the first measuring space, formed therethrough, and
• a second connecting space, in which one end thereof is opened toward an external fluid that flows outside the pipe and another end thereof communicates with the opened one side of the second measuring space, formed therethrough, and
• wherein the opened one end of the first connecting space is covered by the first flexible member, and the opened one end of the second connecting space is covered by the second flexible member, and
• wherein the first measuring space and the second measuring space, and the first connecting space and the second connecting space are filled with the pressure transmitting fluids.