The new TS Series Hydrogen Sulfide Gas Detectors from General Monitors now provide advanced protection against the deadly hazards of hydrogen sulfide gas (H2S) for a wide range of applications. The TS Series for H2S gas detection includes two models: the TS4000 and the TS400. They both sense H2S over a broad range from 0 to 100 ppm. The advanced electrochemical cells in these devices feature a precision laser weld design that provides superior casing integrity.