Rolling Thin Film Oven RTFOT for the determination of temperature and air influence on bitumen. The temperature controlled oven with door and viewing glass is preset to a test temperature of 163°C. The rear inside wall is equipped with a vertical carriage, rotated by an electric motor at 15 1/min. and prepared to support 8 glass test cups. An outlet orifice 1 mm dia. is connected to a copper tubing with air jet providing an airflow of 4000 ml/min. to the samples. To set the required airflow a special regulator is installed. Compressed air or an air compressor 20-2577 is necessary for the test. Required glass test cups 20-2573 or 20-2574 to be ordered in addition.