Measuring device and method for detecting the hydrocarbon content in gases

摘要

The invention relates to a measuring device for detecting the hydrocarbon fraction in gases. The measuring device is characterized in that the measuring device determines the hydrocarbon fraction in a first gas flow and a second gas flow, both the first gas flow and the second gas flow originating from the same gas source, the first gas flow being fed to the measuring device unchanged and the second gas flow being fed to the measuring device prepared.

主权项

1. A measuring device for detecting hydrocarbon content in gases of a gas source, wherein the measuring device comprises a reference gas unit and a sensor adapted to detect hydrocarbon content in gases, and the measuring device is further configured to detect the hydrocarbon content in a first gas stream and a second gas stream originating from the same gas source utilizing said sensor, the first gas stream being unchanged and the second gas stream being processed by the reference gas unit before it is fed to said sensor, the first gas stream and the second gas stream being fed to said sensor in an alternating manner, wherein the measuring device is configured to determine the hydrocarbon content in gases from the gas source based on a difference between signals generated by the measuring device upon examining the first gas stream and upon examining the second gas stream, wherein the reference gas unit comprises an oxidation catalyst adapted to oxidize hydrocarbons in the second gas stream, thereby increasing the humidity of the second gas stream, and the measuring device is further configured to admix a dry test gas to the second gas stream before it is fed to said sensor to provide the second gas stream substantially corresponding to the first gas stream in humidity content.