After the huge success of the full enclosure, In Vivo Scientific wanted to fill a niche that they had been missing, the stage top incubator. Dr. Ward wanted to incorporate many of the same features of the full enclosure while once again improving on standard stage top designs. What was critical to him was that the environment completely sealed with no outside atmosphere able to permeate the environment. He also wanted to utilize InVivo’s proprietary humidification design that is significantly more sterile than other environments. He insisted the water bath be in the environment to allow for a higher degree of humidity and lastly he wanted the controller to be completely digital. This digital control allowed for very tight specifications on heat, gases and flow control of these gases.