| Volume range compatibility |
Ensure it supports the size of pipettes youll use (e.g., 0.1100 mL). |
| Speed control / modes |
For different liquids (viscous, delicate) you may need adjustable speed, motor vs gravity modes. |
| Safety features |
Hydrophobic filters, safety valves reduce risk of contamination or damage to pump. |
| Battery life / power |
For battery-powered models check how many hours of use, charging time. |
| Ergonomics / compatibility |
Comfortable onehand operation, compatibility with serological or Pasteur pipettes. |
| Budget / maintenance |
Manual fewer electronics = lower cost; electric gives more features. Also check spare parts, filter replacements. |