Inside made of stainless steel temp. Range 5° C above ambient to 90° C. Temp. controlled by pid controller. This chamber has air circulating fan to ensure uniformity of temp. A carrier to hold bottles (6 number of 60 mm diameter x 200 mm depth) can be easily placed on front of rotator mechanism any bottle can be taken out easily from the carrier. The carrier rotates with bottles parallel to the door at a variable speed of 2 to 16 RPM. Viewing glass window in the top allows inspection of the specimen inside the chamber.