Air Displacement Pumps are working like electronic hand pipettes by aspirating a medium from one vessel into a disposable tip and dispensing it into another vessel.
Air Displacement Pumps are working by displacing air in a reservoir by lowering a piston. By removing the piston from this reservoir a negative pressure is created which sucks the desired medium through a short tubing into a disposable tip. The medium is not supposed to get into the pump itself.
There are two ways to seal the piston against the cylinder. The simplest one is to use a so-called “static seal” where the seal is fixed and the piston is moving through this seal into the reservoir room.
The other way is to use a “dynamic seal” which is connected to the piston and moving up and down with the piston like in a syringe pump. This type is used in TriContinent Air Displacement pumps.
The Air Displacement pump is mounted typically on a robot arm which allows to move it over a platform where different vessels such as vial, tubes or micro plates are located which contains the reagents and samples. Typical applications are sample preparation, sample reformatting, dilution, Reaction set-up (e.g. for ELISA or PCR).
We are providing two types of Air Displacement Pumps, the Z-Pumps and the iZ-Pumps.
The Z-pump is more or less the standard version which provides only aspiration and dispensing while the iZ-Pump provides active tip drop, capacitive and pressure based liquid level detection (LLD), clogged tip detection and the option to monitor pressure curves which can be used for pipetting verification.
The iZ-Pump has all necessary control and communication electronics on board.