1. Injection pump
The motor drive the screw to gradually rotate to push the piston of syringe then liquid out.
Motor with rotate reverse(CCW) will cause liquid be suction
Advantage:working pressure above to 1500psi;high accuracy <0.1%; transfer without pulse.high accuracy with both small and big flow rate.Easy disinfection; available to inject and suction.
Muti- channel optional from 1 to 10
Disadvantage:restricted flow rate; light higher price
Typical application:transfer sample/Calibration fluid to mass analyzer; syringe medicament precisely into animal; liquid be sucked into cavity with high pressure .
2. peristaltic pump
The tube is squeezed by roller rotating to push the liquid out,there is usually 3 or 4 rollers.
Advantage: transfer continually; easy sterilized; lower cost, muti-channel 1-16 optional for inject and suction
Disadvantage:lower pressure.30psi or lower;pulse transfer.moderate accuracy:1% to 3%.
Typical application:transfer liquid into cell and tissue; stable flow rate; large liquid transfer available; flow rate is available controlled when syringe into animal.
3. Membrane pump
The screw moved by motor or magnetic valve driven to push the diaphragm elastic force and rebound.
Advantage;less maintain; suspension /corrosion liquid available;
Disadvantage:singe channel;pulse transfer;moderate pulse;2%; only for syringe,difficult disinfection.
Typical application: transfer high corrosion medium.