Skylab instruments & engineering supplies `labtop` stability test chamber. To conduct stability and shelf-life studies on drugs and drug substances, this test chamber is specially designed. Following are some of the technical features of this test chamber which include: cabinet of the chamber is insulated with high density cfc-free polyurethane foam; interior of the chamber is mirror finish resistant stainless steel [304ss, 0.8 mm thick]; exterior is white powder coated [1.0 mm thick] ms, and the door has a magnetic door gasket with a keyed door lock; is provided with stainless steel utility basket or pull-trays for storage. The cooling is effected by a hermitically sealed compressor of high quality. This stability test chamber is also available in stainless steel. To ensure even distribution of humidity and temperature, it has an unique airflow system. Temperature stability is ensured by the formed-in-place puf insulation and reduced energy consumption. It is provided with micro controller based pid controller for precise control of temperature and humidity. Refrigeration system is also provided with this chamber with cfc-free compressor and r-134a eco-friendly refrigeration system with time delay.