Upright type ULT(deep) freezers with the temperature ranges -86 degree C to � 40 degree C 1.Bottom mounted Two stage Auto Cascade Refrigeration system can get cooling performance maximum -86 degree C , continuously. 2.Operon’s Internationally Patent registered “Auto Cascade refrigeration system� is applied. 3.Advanced CFC-free/HCFC-free refrigerants systems . 4.Exclusive LBP hermetic compressor enables noise level less than 55dB. 5.Performance testing is guaranteed in warm (+30 degree C) 6.The Electrical overload protection safety device protect the compressors and sequence-restart . 7.Integrated safety device for overload and thermal protection. 8.The automatic timer & relay systems will automatically restart the unit in case of power failure. 9.Specially designed large capacity of Air cooled condenser and aero-dynamic axial fan 10.Cooling coil : Down-feed evaporator for maximum heat removal and temperature uniformity. 11.Eye level mounted microprocessor controller digital display 0.1 degree C increment 12.Specially designed refrigeration system allows free-setting temperature. 13.Door lock with key and Double password 1st for access 2nd for data correction. 14.Audible & Visual Low and High alarm 15.Standard RS-232 data port with interface can be data acquisition & data control upto maximum 16 channels via user’s PC 16.Anti corrosion stainless steel & Round corner Inner chamber. 17.Four stainless inner doors minimize cold air loss & Cold rolled steel with powder coated outer door. 18.Cold rolled steel with powder coated Outer cabinet . 19.The Rim heating systems to prevent ice collecting on the gasket. 20.Triple sealed silicon gasket minimize cold air loss and assure the stable temperature. 21.130mm of high density poly urethane foam insulation. / Vacuum insulation panel available. 22.Washable condenser filter with hinged grill allow easy access to filter. 23.Heavy-duty dual wheel swivel locking casters . 24.Built in the Vacuum relief port for easy door opening(Validation access port) .