Fluid Aspiration

Fluids can be sucked into a collection bottle by using a vacuum pump to create low pressure in the bottle. Sufficient vacuum in the collection bottle is essential to support aspiration, but should not be so deep to risk evaporation of solvents. Adjustable suction power (and hence vacuum level) enables sensitive or powerful aspiration as needed. For optimum operational safety and convenience, self-closing quick couplings and a liquid level detector at the bottle are helpful. All components in contact with aspirated media should have high chemical resistance and be autoclavable. Depending on aspiration safety protocols, a collection flask made either of polypropylene or glass may be preferred.

Process requirements

  • adjustable suction force, with modest vacuum at most
  • delicate aspiration of sensitive samples; rapid aspiration of large volumes of liquids
  • vacuum available automatically on demand to keep users hands free for working
  • very limited need for high-precision vacuum control
  • minimal distraction by vacuum control while handling biological materials

Pump requirements

  • single stage chemistry diaphragm pump with good suction power
  • outstanding chemical resistance of the complete system for samples containing solvents, as well as for aspiration operations with disinfectants in receiving flask
  • conveniently adjustable vacuum level for adaption to application requirements
  • collection flask with protection filter to protect pump and workplace from biologically hazardous material
  • high operational comfort to minimize fatigue and operator errors