... emitted from building materials, decoration materials and furniture, includes toluene, ammonia, H2S, formaldehyde and other harmful gases. Its ... of volatile pollutant gases (VOC) such as ammonia, toluene,formaldehyde and cigarette smoke, alcohol, H2S, and carbon monoxide ... time u High sensitive to volatile gases like ammonia, toluene, formaldehyde, sensitive to cigarette smoke, alcohol, H2S, etc ...