DEVICE FOR MONITORING LEAKAGE

摘要

PROBLEM TO BE SOLVED: To obtain a device for monitoring leakage which can distinguish the leakage of fluid from the normal use thereof without complicating a structure and by an inexpensive constitution.SOLUTION: In order to constitute the device for monitoring leakage including a flow rate change detecting means which detects a flow rate change occurring as a response to a given pressure change and a determination means 7d which determines whether or not the leakage of the fluid occurs at the downstream side, based on the detected flow rate change, a flow sensor 6 which is equipped with a single sensor having an electric resistance part formed in a prescribed pattern on a diaphragm and a pair of electrodes detecting electrical characteristics of the electric resistance part to make the fluid flow along the surface and the back of the diaphragm is provided in a flow rate detecting part of the flow rate change detecting means while a flow rate deriving means which derives a flow rate of the flow flowing through a conduit 2 from an electric output outputted through the paired electrodes of the flow sensor 6 is provided in the flow rate change detecting means.