Product Description Performance Temperature range from ambient +10C to 250C. Microprocessor PID control / Temperature calibration / Automatic tuning. Forced air convection ensures optimal air circulation, temperature uniformity, and short heat-up time. Fan speed control by an analog dial prevents powdered samples from blowing away. (optional) Adjustable dual slide vents for inner vapor circulation. Convenience Intuitive control panel with bright LED displays. (0.1Cresolution) Dual wait on/off timer modes. (1 min. to 99 hr. 59 min.) Convenient presetting function for 3 most commonly used temperature settings. Rounded inner chamber corners for easy cleaning and optimal airflow. Corrosion-resistant incoloy sheath heating element and stainless steel interior. Threefold tempered-glass window provides clear inside view of the chambers. (optional) 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 Solid door (without window) OF-02G OF-12G OF-22G Window door OF-02GW OF-12GW OF-22GW Chamber volume (L / cu ft) 60 / 2.1 102 / 3.6 151 / 5.3 Temperature Range ( / ) Amb. +10 to 250 / Amb. +18 to 482 Fluctuation1) at 100 (±, / ) 0.5 / 0.9 0.6 / 1.08 0.8 / 1.44 Variation1) at 100 (±, / ) 1 / 1.8 1.3 / 2.3 1.7 / 3.1 Dimension (WDH) Interior (mm / inch) 400360420 / 15.714.216.5 480410520 / 18.916.120.5 550460600 / 221823.6 Exterior (mm / inch) 577642760 / 22.725.330 657692870 / 25.927.234.3 727742974 / 28.729.238.3 No. of wire shelf (standard / max.) 2 / 4 2 / 6 2 / 7 Net weight (Kg / lbs) 53 / 117 63 / 139 72.5 / 160 Electrical requirements (230V, 50 / 60Hz) 4.4A 6.1A 7.4A