This instrument measures the stress of water pressured by compacted espresso grounds throughout espresso extraction. A typical instance shows stress in bars or kilos per sq. inch (PSI). This studying gives essential suggestions on the brewing course of.
Correct stress monitoring is crucial for reaching optimum espresso high quality. Constant stress ensures balanced extraction, avoiding under-extracted, bitter photographs or over-extracted, bitter ones. Traditionally, baristas relied on expertise and visible cues. The introduction of this machine supplied a quantitative measure, permitting for higher precision and repeatability, contributing considerably to the evolution of espresso preparation from an artwork to a extra refined craft.