| 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 (W×D×H) | 
            Interior (mm / inch) | 
            375×370×370 / 14.8×14.6×14.6 | 
            455×430×510 / 18×17×20 | 
            585×460×555 / 23×18.1×21.9 | 
        
        
            | Exterior (mm / inch) | 
            530×535×737 / 20.9×21.1×29 | 
            610×595×877 / 24×23.4×34.5 | 
            740×625×922 / 29.1×24.6×36.3 | 
        
        
            | 
             No. of wire shelf (standard / max.)    
             | 
            2 / 9   | 
            2 / 13  | 
            2 / 13  | 
        
        
            | Net weight (Kg / lbs) | 
            34 / 75 | 
            46 / 101.4 | 
            59 / 130 | 
        
        
            | Electrical requirements (230V, 50 / 60 Hz) | 
            4.3A | 
            6A | 
            7.4 A |