| 摘要 |
<p>A gas flow detector for use in a combustible gas duct system, which comprises a transparent hollow cylinder or sleeve which is provided with an inlet and an outlet at different levels so that, when the sleeve is partially filled with a liquid, gas can be directed, from the inlet, through the liquid to the outlet without liquid exiting through the outlet. The relative position of the liquid and the inlet port can be varied so that, in one position gas flow from the inlet to the outlet passes through the liquid in the cylinder and, in another position bypasses such liquid.</p> |
