This gravity convection incubator has been designed for the Ogawa medium. It features a microprocessor PID controller, which has a digital display and setting. An air jacket system is incorporated which ensures a uniform temperature is maintained and distributed in the chamber, as well as providing excellent thermal insulation. A built-in shut-off circuit automatically prevents overheating. The four chambers can work independently from each other, being able to operate at different conditions and with the ability to be controlled individually by a separate PID auto-tuning controller. The gravity convection incubator has a double door system, the inner door of which has tempered glass in order to prevent heat loss and for convenient observation.