These roller mixers can accommodate a range of different vials, small bottles, and test tubes of various sizes. Each pair of rollers can hold up to 1 kilogram. As an example the BTR5-12V can hold up to 24 x 5ml blood tubes. The coated aluminium rollers are mounted on eccentric drive spindles to provide a rocking as well as rolling motion, ensuring a thorough mixing action. Parallel rollers can be specified, if preferred.
 
Speed of the rollers is variable between 10 and 60 rpm. to cover a wide range of mixing requirements. The sprocket and chain drive, coupled with ball race roller mounting, will ensure smooth trouble free operation.
 
The Ratek BTR range is driven by a Swiss made motor that gives long and quiet service life and unparalleled reliability.  Precise speed adjustment is delivered by the solid state speed control, whilst being powered by a safe low-voltage power supply making them suitable for use inside fume cupboards and incubators.
 
Both the BTR5 and BTR10 mixers can run continuously for many hours unattended.