The Heidolph PD5001 Analog Pump drive PD 5001 has high precision even for flow rates starting at 0.005ml/min and it is suitable for the use in cell biology just due this model features a smooth start operation which prevents spills and splashing media. The speed will ramp up slowly until your set rpm has been reached. It also has a safety continuous operation: the motor will be switched off if a high thermal load situation occurs to prevent accidents.