Monitor rilevatore gas singolo anidride solforosa SO2 display LED allarme portatile 0-20PPM
H2S 0-100ppm 0.1ppm 10ppm 20ppm. C2H4O 0-100ppm 1/0.1ppm 20ppm 50ppm. SO2 0-20ppm 0.1/1ppm 5ppm 10ppm. NH3 0-100ppm 0.1/1ppm 20ppm 50ppm. This is a portable single gas detector can make continuous detection to combustible and toxic gases.