CONTROLLED ATMOSPHERE INCUBATOR

摘要

A controlled atmosphere incubator (10) having an interior chamber (14) surrounded by a heated water jacket (78). A glass access door (18) of the chamber (14) is directly heated by a clear, electrically conductive coating (50). The door (14) is sealed against the perimeter of the opening by a readily replaceable gasket (64) and is field reversible due to unique hinge mounting assemblies (30). An easily accessed blower assembly (100) is located within the chamber (14) and inlcudes a HEPA filter (116) readily replaceable by the user from within the chamber (14). A filtered air exchange system is provided for limiting the maximum level of humidity in the chamber (14). The incubator control maintains constant power output from the blower motor (156) so that the heat output of the motor (156) is also constant. A voltage compensated temperature control is also provided for the heaters associated with the water jacket. Compensation for environmental conditions inside the chamber is also provided by the control for producing more accurate readings of carbon dioxide levels. When an infrared carbon dioxide sensor is used, the control provides a unique calibration method which does not necessitate the use of conventional tanks of calibration gas mixtures.