We will be working with E. coli. We do not have graduate students or postdocs, so we are looking for an easy system to get up and running without a lot of customization. We need 37 C growth conditions and will need to let it grow for several days.
How precisely do you need conditions to be controlled? And what volume? A relatively simple flow-through system would involve inflow and outflow ports with aeration, circulation, and heating of the contents. A 1L or larger filter flask might do the job...