The RAS system comprises an aerosol generator, a liquid heating unit, a thermocouple to measure the temperature, and an aerosol distributor with six outlets. Six outlet cylinders are connected to these outlets on the aerosol distributor by means of hose connections. The liquid to be nebulized, e.g. DEHS, is able to be heated. The highly accurate aerosol concentration is obtained by means of a special aerosol generator and one mass flow controller each for the generator and for the mixed air. The RAS 3000 enables a defined aerosol to be generated with the required reference source flow (QRef ) at six different points simultaneously within the operating room for protection degree determination (SG) as per SWKI 99-3 and DIN 1946-4. The RAS 3000 features the option to rapidly and reproducibly adjust the reference source flow (QRef). Why is protection degree determination necessary? An operating room is a special place intended to protect the patient and personnel against contamination. Different ventilation systems can be used to keep the air clean. The efficacy of these ventilation systems must be reproducibly verifiable within the operating room.
Delhi, India
