A device designed for brewing espresso typically includes a component for monitoring pressure. This component allows users to observe the pressure exerted during the extraction process, a crucial factor influencing the quality of the resulting beverage. For instance, a machine might display a reading of nine bars, the generally accepted optimal pressure for espresso extraction.
Precise pressure monitoring facilitates consistent and high-quality espresso. This monitoring capability allows users to fine-tune the grind size, tamping pressure, and other variables to achieve the desired flavor profile, preventing under- or over-extracted shots. Historically, this level of control was absent in earlier models, leading to greater variability in the final product. The ability to monitor pressure has contributed significantly to the evolution of espresso preparation from a skilled craft to a more repeatable process, accessible to a broader audience.
