Product Description Performance Temperature range from ambient +3C to 60C. Microprocessor PID control / Temperature calibration / Automatic tuning. Vibration-free design ideal for yeast cultivation. Free from noise, vibration, and mechanical troubles by film type heating method. Convenience Intuitive control panel with bright LED display. (0.1resolution) Dual wait on/off timer modes. (1 min. to 99 hr. 59 min.) Convenient preset function for 3 most commonly used temperature settings. Convenient sample monitoring without affecting chamber temperature via the inner tempered-glass door. Rounded inner chamber corners for easy cleaning and optimal airflow. Stackable up to 2 units using the optional stacking kit. (optional) Safety Automatic run after power interruption. Keypad lock function prevents accidental changes during operation. Over-temperature and over-current protection. Audible and visible open door alarms. Model IB-01E IB-11E IB-21E Chamber volume (L / cu ft) 65 / 2.3 150 / 5.3 205 / 7.2 Temperature Range ( / ) Amb. +3 to 60 / Amb. +5.4 to 140 Fluctuation 1) at 37 (±, / ) 0.2 / 0.36 0.3 / 0.54 0.1 / 0.18 Variation 1) at 37 (±, / ) 0.6 / 1.08 0.8 / 1.44 1.1 / 1.98 Dimension (WDH) Interior (mm / inch) 423355445 / 16.71417.5 500515585 / 19.720.323 632515630 / 24.920.324.8 Exterior (mm / inch) 533475725 / 2118.728.5 595630865 / 23.524.834 740630910 / 29.124.835.8 No. of wire shelf (standard/ max.) 2 / 10 2 / 13 2 / 14 Net weight (Kg / lbs) 33 / 72.8 47 / 103.6 57 / 125.7 Electrical requirements (120V, 50 / 60Hz) 2.1A 4.2A 4.6A