Input lever
Grind & Particles
Wheel face
Grinder model
The grinder used to prepare the coffee.
AeroPress Wheel Variable
PSD width
Grind & Particles · Process state
How wide the particle size distribution is.
Process state
Grind & Particles
Wheel face
Technical science
Definition
PSD width describes how broad the distribution is between small, medium, and large particles.
Why It Matters
A wider distribution can create more uneven extraction and more variable flow behavior.
Used In Recipe Language Like
Brewers may refer to this as particle size distribution.
Brewers may refer to this as uniformity.
Synonyms
particle size distribution
uniformity
Page Context
PSD width is part of the Brew Supply AeroPress Wheel and helps brewers describe how wide the particle size distribution is.
Related variables
Input lever
Grind & Particles
Wheel face
Burr set
The burr geometry installed in the grinder.
Input lever
Grind & Particles
Advanced detail
Burr alignment
How evenly the burrs are aligned.
Input lever
Grind & Particles
Wheel face
Grind setting
The selected grind size setting.
Input lever
Grind & Particles
Wheel face
Grind speed / RPM
The speed at which the grinder is operated.
Input lever
Grind & Particles
Wheel face
Sieving
Separating grounds by particle size after grinding.
Affected outcomes
Measured metric
Cup Outcome
Wheel face
Beverage TDS
Measured total dissolved solids in the served beverage.
Calculated metric
Cup Outcome
Wheel face
Extraction Yield
Calculated percentage of coffee mass extracted.
Measured metric
Cup Outcome
Wheel face
Beverage Yield
The liquid beverage mass collected or served.
Cup outcome
Cup Outcome
Wheel face
Aroma
The smell of the brewed coffee.