Resolution: CO: 1ppm, H2S: 1ppm, O2: 0.1%VOL, LEL: 0.1%LEL. Accuracy: CO: ±10%, H2S:±5%, O2: ±3%FS, LEL: ±5%FS. Alarm Point: Low Alarm Point CO: 35ppm, H2S: 10ppm, O2: 19.5%VOL, LEL: 10%LEL. Oxygen: 0~30% vol; Carbon monoxide: 0~999ppm; Hydrogen sulfide:0~500ppm; Combustible:0~100%LEL.
eBay