What is the use of the Ambu Mark III Resuscitator in polluted or toxic atmosphere characterized by?
As to ventilation in polluted or toxic atmosphere the Ambu Mark III Resuscitator (with the gas filter adapter for attachment of various standard gas filters) offers considerably better protection against penetration of various gases compared to resuscitators made of Silicone rubber. The standard Ambu Mark III Resuscitator has an outer cover made of Chloroprene rubber providing excellent protection. The special Ambu Mark III Resuscitator, however, has an outer cover made of Butyl rubber providing optimal protection. Below is a table comparing penetration of selected gases in different rubber materials. Penetration of gases in vulcanized material in 10-9 cm2 x sec. -1 x at-1 at 80 degrees C Rubber basis Oxygen Nitrogen Carbon dioxide Natural rubber 400 360 2,100 Chloroprene rubber(Ambu Mark III, standard model) 90 80 810 Butyl rubber (Ambu Mark III, special model) 50 35 290 Silicone rubber 4,100 3,600 13,000 Source: Walter Null – Chemie und Technologie der Silicone, Chapter 9, p. 446. Th
