This model is ideal for BOD storage of sewage and waste water applications, and other uses like fermentation studies and drug stability tests. It has stainless steel chamber and two doors, when the outer metallic door is opened there is inner glass door. Excellent temperature uniformity is obtained by forced air circulation. A PID microprocessor temperature controller provide accurate and constant temperature. Dual display of setpoint and chamber temperature. Hermetically sealed compressor and automatic defrost.