Product Description Performance Temperature range from ambient +15C to 220C. Microprocessor PID control / Temperature calibration / Automatic tuning. Gravity flow convection for uniform sample heating. Adjustable dual slide vents for inner vapor circulation. Convenience Intuitive control panel with bright LED displays. (1Cresolution) Dual wait on/off timer modes. (1 min. to 99 hr. 59 min.) Convenient presetting function for 3 most commonly used temperature settings. Corrosion-resistant incoloy sheath heating element and stainless steel interior. Moderately sized, an easy to clean spacious chamber, and an easy to grip circular door handle. Safety Keypad lock function prevents accidental changes during operation. Automatic run after power interruption. Over-temperature and over-current protection. Audible and visible open door alarms. Specifications Model ON-01E ON-11E ON-21E Chamber volume (L / cu ft) 52 / 1.8 100 / 3.5 150 / 5.3 Temperature Range ( / ) Amb. +15 to 220 / Amb. +27 to 428 Fluctuation 1) at 100 (±, / ) 0.3 / 0.54 0.4 / 0.72 0.5 / 0.9 Variation 1) at 100 (±, / ) 6.5 / 11.7 4.1 / 7.38 7.3 / 13.14 Dimension (WDH) Interior (mm / inch) 375370370 / 14.814.614.6 455430510 / 181720 585460555 / 2318.121.9 Exterior (mm / inch) 530535737 / 20.921.129 610595877 / 2423.434.5 740625922 / 29.124.636.3 No. of wire shelf (standard / max.) 2 / 5 2 / 7 2 / 7 Net weight (Kg / lbs) 34 / 75 46 / 101.4 59 / 130 Electrical requirements (230V, 50 / 60 Hz) 4.3A 6A 7.4 A