Input lever
Time & Sequencing
Wheel face
Timer start rule
The event that starts the timer.
AeroPress Wheel Variable
Contact time
Time & Sequencing · Process state
The total time water and coffee are in contact.
Process state
Time & Sequencing
Wheel face
Official standard
Technical science
Definition
Contact time is the full water-coffee contact window across bloom, steep, and separation.
Why It Matters
It is one of the broadest extraction variables but still needs phase detail to be fully useful.
Page Context
Contact time is part of the Brew Supply AeroPress Wheel and helps brewers describe the total time water and coffee are in contact.
Related variables
Input lever
Time & Sequencing
Advanced detail
Grind-by time
The target time by which grinding should be complete.
Input lever
Time & Sequencing
Wheel face
Bloom time
The time between initial wetting and the next major action.
Input lever
Time & Sequencing
Wheel face
Pour timing
When staged pours start and end.
Input lever
Time & Sequencing
Detail panel
Cap-on timing
When the filter cap is attached.
Input lever
Time & Sequencing
Wheel face
Stir timing
When stirring happens in the brew.
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.