DETECTOR FOR MINUTE LEAKAGE OF GAS

摘要

PURPOSE: To accurately discriminate the leakage of gas from a gas supply tube regardless of the change of the temperature of the outside air. ;CONSTITUTION: A flow rate sensor 27 which detects the flow rate of gas in the gas supply tube, a pressure sensor 29 which detects the pressure change below the flow rate sensor 27, and a timer 37 which continuously measures the time when the gas flow rate is detected by the flow rate sensor 27 are provided. When the time counted by the timer 37 reaches a prescribed time, processing of an alarm or the like is performed, and it is discriminated whether gas flows or not based on the signal indicating whether gas flows or not from the flow rate sensor 27 and the signal indicating whether the pressure is changed or not from the pressure sensor 29; and if it is discriminated that gas does not flow, time counting of the timer 37 is reset.;COPYRIGHT: (C)1993,JPO&Japio