The BIOSTAT® RM TX system includes an automatic control unit and a swing platform for gently agitating the single-use Flexsafe® RM bag. BIOSTAT® RM TX enables patient-specific T cells or other types of immune cells to expand in vitro. BIOSTAT® RM TX is used for process development and the expansion of related cell numbers. The system can perform a combination of fed-batch, perfusion processes or culture modes.