5M sulfur dioxide detection tube for sulfur dioxide SO2, ranging from 20ppm to 100ppm, from 100ppm to 1800ppm, and from 1800ppm to 3600ppm. Detection types include ammonia, benzene, carbon monoxide, hydrogen sulfide, sulfur dioxide, hydrogen fluoride, carbon dioxide, chlorine gas, hydrogen chloride, nitrogen oxides, total hydrocarbons, acetone, xylene, butanone, toluene, phosphine, nitrogen dioxide, trichloroethylene, hydrogen cyanide, chloroethylene, mercaptan, chlorine dioxide, methyl bromide, ozone, butane, gasoline, diesel, formaldehyde detection tubes, etc