To change a time up to a decision of a leakage of a gas of a gas supply passage in response to much or small leakage content of the gas.
A gas leakage detector detects the flow rate of the gas flowing through the gas supply passage by a flow rate detecting means 11, and determines a large or small value of the flow rate of the gas detected by the means 11 from a specified measurement reference value by a flow rate decision means 12. The flow rate of the gas for a period in which the flow rate of the gas is judged to be less then the reference value by the means 12 is integrated by an infinitesimal flow rate integrating means 15, and when the integrated value integrated by the means 15 exceeds a specified leakage decision value, the sending device determines that there is a leakage in the supply passage.
FUJII YASUHIRO
TAGAWA SHIGERU
| JPH11258098A | 1999-09-24 | |||
| JP2000180223A | 2000-06-30 | |||
| JPH03108630A | 1991-05-08 | |||
| JPH10307050A | 1998-11-17 | |||
| JPH08240507A | 1996-09-17 | |||
| JPH11271164A | 1999-10-05 |