Gas monitor for liquid flow line

Claim 2

A meter for identifying the concentration of gas in a liquid flow comprising: a gas/liquid separating chamber having an inlet for receiving a liquid and any gas carried by that liquid, a gas outlet, and a liquid outlet; a control valve for blocking flow through said gas outlet so that separated gas will collect and depress the level of liquid in said separating chamber; means for measuring liquid flow out of said chamber; and means for measuring separated gas by monitoring the liquid level in said separating chamber.

Claim 3

The meter of claim 1 further including: a probe line for supplying liquid from a main pipeline to said separating chamber inlet; a means for providing a pressure drop in said probe line to bring gas dissolved in said liquid out of solution; and means for measuring pressure and temperature in said separating chamber to provide values for use in determining dissolved gas concentration.

Claim 4

The meter of claim 1 in which: said liquid flow measuring means comprise a meter for measuring the volumetric rate of liquid flow from said separating chamber, which liquid flow equals the total flow of gas and liquid into said separating chamber when said gas outlet is blocked; said separated gas measuring means comprise probes disposed at a reference and at least one lower level in said separating chamber to signal collection of a preselected quantity of gas, and means for measuring the time required for that collection; and the meter further includes a signal processor for utilizing the measured liquid flow rate and gas collection time to provide a gas concentration output signal.