With our unique and proprietary heat distribution technology, the ST Series of CO2 incubators provide the highest levels of temperature accuracy with minimal fluctuation (within 0.1°C). The six-side heating system, in combination with a low speed internal fan, uniformly spreads air throughout the chamber (without air exchange from the external environment). The chamber walls are constructed of high grade (316) stainless-steel, and all corners are rounded, preventing the accumulation of dirt/debris. For added security, all models feature an internal alarm to alert the user if the CO2 percentage changes, or the temperature fluctuates by more than 1°C from the set point. In addition, a “quick-cal” calibration button allows for quickly adjusting the chamber temperature to match that of a properly calibrated external thermometer. Two series (standard and PLUS) are each available in 45L and 180L chamber sizes. PLUS models include advanced programming for high heat decontamination (at 125°C), a unique split inner glass door for access to the chamber without exposing it fully to the external environment and programmable humidity percentage, up to 95%. Specifications: Temperature Range: Ambient +5° to 60°C Temperature Increments: 0.1°C Temperature Uniformity: ± 0.4°C* Temperature Stability: 0.1°C Temperature Accuracy: 0.1°C CO2 Range: 0 to 20% CO2 Increment 0.1% CO2 Accuracy ± 0.1% CO2 Sensor: Dual Beam IR Chamber Dimensions: (45L) 13.2 x 14.2 x 15.4 in. / 33.5 x 36.1 x 39.2 cm Chamber Dimensions: (180L) 18.7 x 20.8 x 28 in. / 47.3 x 52.8 x 71 cm Chamber Volume: 45L / 180L Chamber Material: Stainless Steel (316) Exterior Dimensions (45L): 16.5 x 18.3 x 21.8 in. / 42 x 46.5 x 55.3 cm Exterior Dimensions (180L): 22 x 26.2 x 37.2 in / 56 x 66.5 x 94.5 cm Weight (45L): 77 lbs / 35 kg Weight (180L): 172 lbs / 78 kg Electrical: 120V or 230V, 50-60Hz (350W) PLUS Models Only High Heat Decon: 125°C for 8 hours Humidity Control: Up to 95% Split Inner Door Compartments: 45L: 2 / 180L