检测范围:硫化氢 (H2S):0-100 ppm (增量为 1/0.1 ppm)CO:0 - 500 ppm (增量为 1 ppm)O2:0 - 30.0% vol. (增量为 0.1% vol.)可燃物气体 (LEL):0 - 1OO% (LEL 增量为 1%)或0 - 5.0% v/v 甲烷