The Bellco Cell Production Roller Apparatus has been designed for production of animal cells, viruses, and cell products. Modular units are available from 5 to 45 bottle positions and allow easy expansion with modular add-on decks. Non-modular production units come in 45 and 50 bottle positions with over 80,000 cm2 of surface area. Rollers have a key design to eliminate slipping and are easily removable for servicing of bearings. Rollers are formulated from a chemical-resistant non-slip EDPM. All units feature a solid state control with heavy-duty DC motor and digital display. All Position Drives are for use with plastic roller bottles to prevent slipping of the light-weight bottles. Roller Shaft Construction: Non-transferring chemical-resistant rubber rollers with key-shape. Clearance between Decks for Bottle Placement: 134 mm. Construction Material: Aluminum, enamel finish. Usable Roller Length: 51 cm. Brushless motor with controller for smooth operation and no maintenance. Easy-to-remove roller bar assembly (tool provided). Digital LCD display. Locking speed control knob. All position drives. Accepts all Bellco Roller Bottles (glass or plastic* in 110mm or 120mm diameter). Battery backup provides 18 hour service (typical at 2 RPM). Battery backup includes both audible and visual indicators. Motion Alarm