7HH 硫化氢H2S电化学气体传感器 测量范围0-500PPM

7H2S-200CLE-0122-7000-200 ppm   0.25 ppm1000 ppm-20 to +507H2S-50CLE-0151-7000-50 ppm   0.25 ppm50 ppm-20 to +50