ST-45 Plus CO2 Incubator, 45L, with 2 shelvesPrecision temperature control, 6 sided heating Precise monitoring over CO2 with dual beam IR sensor Seamless, stainless steel chamber Digital control of humidity percentage (PLUS models only) With our unique and proprietary heat distribution technology, the Benchmark ST Series of CO2 incubators provide the highest levels of temperature accuracy with minimal fluctuation (within 0. 1C). The six side heating system, in combination with a low speed