Commit: Digital pipette: open hardware for liquid transfer in self-driving laboratories

1. Motion—Motion accuracy: not reported
2. Volume0.2%Volumetric accuracy: reported
3. Viability—Cell viability: not reported
4. Unattended—Unattended operation: not reported
5. StandardISO 8655Standard compliance: reported

• Volumetric accuracy0.2%

  [curated metric] 0.2% random error at 10 mL nominal volume (ISO 8655-6); meets ISO 8655-2 accuracy range

• Reported against a written standardISO 8655

  [curated metric] 0.2% random error at 10 mL nominal volume (ISO 8655-6); meets ISO 8655-2 accuracy range

Each score is shown against the range the other 59 builds actually occupy, because no criterion uses the full 1–5 scale. These describe how reproducible the build is, not how good the science is.

• Resolution

  1/1–5

  Nominal 10 mL air-displacement syringe; ISO tests at 1/5/10 mL with smallest tested 0.2 mL; authors concede uL-level accuracy needs higher-precision actuators.

• Throughput

  2/2–5

  Single-channel pipette handling one liquid at a time; automated tip exchange but external tip remover and greasing upkeep; no plate or full workflow demonstrated.

• Parts sourcing

  3/2–4

  Mix of common parts and custom/printed components.

• Skill needed

  4/2–4

  Build/operation described as low-skill or basic assembly.

• Facilities needed

  2/2–4

  Requires specialized facilities, equipment, or consumables.

• Documentation

  4/2–5

  Open resources include several build or operation artifacts.

• Validation effort

  4/2–4

  ISO 8655-6 gravimetric at three volumes against v1 and ISO limits, plus explicit benchmark against four human pipettors (Levene, p=0.0046); calibration curves given.

• Cycle time

  3/1–4

  No timing comparison reported; only a 10-minute assembly time, with no aspiration/dispense or cycle-time data versus manual or commercial pipetting.