High precision portable and handheld CO, H2S, O2 and LEL gas tester with compact size and light weight, very easy to carry and operate. Resolution: CO: 1ppm, H2S: 1ppm, O2: 0.1%VOL, LEL: 0.1%LEL. Accuracy: CO: ±10%, H2S:±5%, O2: ±3%FS, LEL: ±5%FS.
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