Login| Sign Up| Help| Contact|

Patent Searching and Data


Title:
DEVICE FOR MEASURING DIFFERENTIAL PRESSURE
Document Type and Number:
Japanese Patent JP3709985
Kind Code:
B2
Abstract:

PROBLEM TO BE SOLVED: To provide an inexpensive device for measuring differential pressure which has a detection function for an anomaly of a pressure part such as failure of liquid-contact diaphragms or permeation of gaseous hydrogen into a pressure room.
SOLUTION: The device for measuring differential pressure provided with a seal liquid, is characterized in that it is provided with a means for heating and cooling, and a means for detection. The means for heating and cooling heats or cools the filler liquid and changes temporarily internal pressure of the filler liquid. The means for detection compares a pattern of change in output generated in an operating condition of the means for heating and cooling with a normal condition of the device for measuring the differential pressure, and detects the failure or anomaly of the liquid-contacting diaphragms and the permeation of the gaseous hydrogen.


Inventors:
Hiroyasu Takahashi
Ryo Kurosawa
Masashi Morishita
Application Number:
JP2001357297A
Publication Date:
October 26, 2005
Filing Date:
November 22, 2001
Export Citation:
Click for automatic bibliography generation   Help
Assignee:
Yokogawa Electric Corporation
International Classes:
G01L13/02; G01L19/00; G01L19/12; G01L27/00; (IPC1-7): G01L13/02; G01L19/12; G01L27/00
Domestic Patent References:
JP6331475A