About as sensitive as a TCD, the Catalytic Combustion Detector has the hydrocarbon selectivity of an FID, plus the ability to operate on air alone. Because the CCD requires no compressed gases like hydrogen or helium, it can be used in Buck's Gasless GCs where our internal "whisper quiet" air compressor supplies the ambient air carrier gas. The CCD detector can also be used as a hydrocarbon monitor in non-chromatographic applications where the CCD senses the total hydrocarbon content of a flowing air stream, or as a hydrogen/hydrocarbon leak detector.