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Gas Detection System



Gas Detection System


Gas detectors work by passing air drawn from where the mud reaches the surface (the bell nipple) over a hot detector filament. This combusts the gas, raising the temperature and lowering the resistance of the filament. At high voltages all the combustible gases burn, whereas at lower temperatures only the lighter components burn. By recording the change in resistance at different voltages, the relative proportions of the various components may be estimated.