The Sartorius BIOSTAT B Plus Bioreactor System is manufactured by Sartorius. The Sartorius Biostat B Plus Benchtop Laboratory Fermentor/Bioreactor System is a twin configuration bioreactor system with touchscreen controller. The main unit comprises of a stainless steel housing and features a digital controller with touchscreen graphic user interface, and four peristaltic pumps. Culture vessels are equipped with temperature probes only. High performance servo drive combines low shear agitation for cell cultures with high speed mixing for microbial high cell density fermentations. Speed range is 20-2,000 RPM. The pre-owned products will be thoroughly cleaned and fully tested to perform at manufacturer specifications before shipping.