JPS61115942U - - Google Patents

Description

[Brief explanation of the drawing]

The drawings show an embodiment of the invention, in which Fig. 1 is a schematic side sectional view of the pressure sensor when installed, Fig. 2 is a schematic side sectional view of the same when measuring, and Fig. 3 is: It is the same schematic side sectional view showing the time of collection|recovery. 1: Pressure detector, 2: Case, 3: Pressure receiving part, 4
: Back pressure part, 4a: Bellows, 4c: Spring,
5: Differential pressure sensor, 6: First communication path, 7: Second communication path, 8: Transmission medium, 9: Bypass path, 10: First
Switching valve, 11: second switching valve, 12/13: switch body.

Claims (1)

[Claims for Utility Model Registration] (1) A pressure receiving part and a back pressure part on which measurement pressure acts are formed in the case, and a first communicating passage and a second communicating passage are provided between the pressure receiving part and the back pressure part. are connected to each other, and a pressure transmission medium is filled from the pressure receiving part to both communication passages and the back pressure part, a differential pressure sensor is interposed in the first communication passage, and a bypass passage is provided in the second communication passage. are connected to each other, a first switching valve is interposed in the bypass passage, and a second switching valve is interposed between the connecting ends of the bypass passage in the second communication passage, and both switching valves are in a cutoff state when pressure is measured. A pressure detector characterized by: (2) The pressure detector according to claim 1, wherein the back pressure section includes a bellows and a spring.