EX (0-100)%LEL 20%LEL 50%LEL 1%LEL. H2S (0-100) ppm 10ppm 35ppm 1ppm. Portable flammable body detectors. It is necessary to safely monitor toxic and harmful, anti-explosion industries and places. The portable voice type four-in-one gas detector (hereinafter referred to as the detector) is a safety type device that can continuously detect the concentration of leaked gas.
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