Single-unit apparatus with two jackets acc. to ASTM D 892 - IP 146 for tests at 24 and 93.5°C. Equipped with electronic temperature controller, variable area flowmeters, level and overtemp alarm. Differently from many equipment on the market having electronics subject to overheating and quick ageing because placed on the bath cover, ours has a separate control box placed on the right side of the instrument.