Scale accuracy and timing precision
Why precise measurement of mass and time is critical in brewing consistency and quality control.
- Coffee Basics Nerds
- 1 min read
Article 3 of 12 in Measurement & Quality Control/
Scale Accuracy
- Importance: Accurate scales ensure correct brew ratios, dose, and yield.
- Specifications:
- Espresso: 0.1 g precision recommended.
- Filter brewing: 0.5 g precision may be acceptable.
- Calibration: Regularly calibrate with certified weights.
- Best Practices:
- Place scale on a stable, vibration-free surface.
- Tare between each measurement to avoid cumulative errors.
Timing Precision
- Role in Brewing: Brew time controls contact time, extraction yield, and flavor balance.
- Tools: Use digital timers or integrated scales with timers for consistency.
- Applications:
- Espresso: shot times (e.g., 25–30 seconds) strongly influence extraction.
- Pour-over: pour timing affects flow, turbulence, and extraction balance.
Combining Scale and Timer
- Modern barista tools often integrate both functions.
- Essential for reproducing recipes across different baristas and locations.
Summary
Precise scales and reliable timers are foundational to quality control in coffee brewing. They ensure reproducible ratios, extraction yields, and consistent flavor across brews.