Darwin Chambers KB series Environmental Chambers are a top selling unit. It is quiet, easy to clean, highly reliable and ideal for laboratory use. Our environmental chamber offers hot gas bypass control of refrigeration and resistive heat to facilitate reliable, critical temperature and humidity control. All KB series environmental testing chamber models are designed to have a temperature range of 2 to 50o Celsius. Temperatures greater than 50o Celsius or lower than 2o Celsius can be achieved with optional upgrades to construction and components. All KB series environmental chambers come standard with Fuji's PXF4 microprocessor, but we can offer others if preferred. Unlike many proprietary controllers on the market, these controllers are available off the shelf and have been proven in tens of thousands of installations. All necessary functions are included in our Features section below. Many additional options are available both regarding control and recording of data (chart recorders and loggers)