Respiratory protective devices are protective devices intended to protect against hazardous substances in the aeriform state such as particles, vapours and gases by means of the filtering mechanism. These devices, which partially or completely cover the face, are made of filtering material or consist of a reusable structure fitted with replaceable filters. Each class features specific filters.
Standard DIN 58647-7 refers to emergency respirators with a filter for industrial environments. To be used in industrial environments or areas in case of pollution by toxic gases or vapours.