Questions about hydrogen detectors

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According to the interpretation of the provisions in the \"Code for Design of Detection and Alarm Systems for Flammable and Toxic Gases in Petrochemical Industries\" GB50493-2009, Article 5.2.2 states that catalytic combustion detectors used for detecting flammable gases can be ignited by hydrogen; therefore, for hydrogen detection, specialized catalytic combustion hydrogen detectors or thermal conduction/semiconductor-type detectors should be used. The question is: what should be done in environments that contain both hydrogen and other flammable gases? The combustible gas detectors produced by ordinary manufacturers are all of the conventional catalytic combustion type; there are no other types. What should be done in such a situation? I wonder that since there are dedicated catalytic combustion hydrogen detectors, it should be possible to use such detectors to calibrate other flammable gases as well!