Sensor measurement range:

Carbon monoxide (CO): 0 to 1000ppm, with a resolution of 1ppm
Carbon monoxide (CO) low hydrogen interference: 0 to 1000ppm, resolution of 1ppm
Hydrogen sulfide (H2S): 0.0 to 500.0 ppm, with a resolution of 0.1 ppm
Nitrogen dioxide (NO2): 0.0 to 20.0ppm, with an accuracy of 0.1ppm
Nitrogen dioxide (NO2): 0.0 to 50.0ppm, with an accuracy of 0.1ppm
Nitrogen dioxide (NO2): 0.0 to 150.0ppm, with an accuracy of 0.1ppm
Sulfur dioxide (SO2): 0.0 to 20.0ppm, with an accuracy of 0.1ppm
Sulfur dioxide (SO2): 0.0 to 100.0ppm, with an accuracy of 0.1ppm
Sulfur dioxide (SO2): 0.0 to 150.0ppm, with an accuracy of 0.1ppm
Hydrogen cyanide (HCN): 0.0 to 30.0ppm, with an accuracy of 0.1ppm
Ammonia (NH3): 0 to 100ppm, with an accuracy of 1ppm
Ammonia (NH3): 0 to 500ppm, with an accuracy of 1ppm
Ammonia (NH3): 0 to 1000ppm, with an accuracy of 1ppm