-73 degC to +175 degC Temperature Range. 7 Cu Ft Workspace, 24 W x 21 H x 24 D (198 Liters) Programmable Temperature Controller. RS-232 Interface (Opt. GPIB and Ethernet). High/Low Limit Control and Alarm. Viewing Window & Interior Light. 4" Access Ports on Left & Right Side. Non-CFC Cascade Refrigeration.