GAS LEAKAGE-DETECTING DEVICE AND ITS PRESSURE MEASUREMENT METHOD

PROBLEM TO BE SOLVED: To always detect leakage appropriately by preventing the erroneous judgment of a pressure state when measuring an adjustment pressure. SOLUTION: The gas leakage-detecting device checks to see if the average flow rate in a gas supply path is equal to or more than a specific value (21 L/h) (S13, S14), then checks to see if instantaneous flow rate is equal to or more than a given value before measuring pressure (S15), and measures the adjustment pressure as pressure while gas is being used only if the instantaneous flow rate is equal to or more than a given value (S16). Then, the device checks to see if a state where the instantaneous flow rate is equal to or more than the given value continues for a predetermined period or not (S17, S18), and judges whether the adjustment pressure that has been measured is abnormal or not (S19).