What is the purpose of the shot timer on an espresso machine?

The purpose of the shot timer on an espresso machine is to ensure proper extraction time for espresso. This is crucial because the extraction process directly impacts the flavor and quality of the espresso shot. A consistent extraction time helps baristas achieve the right balance of flavors, aromas, and textures by allowing the water to interact with the coffee grounds for the optimal duration. Typically, this time is around 25 to 30 seconds for a standard espresso shot.

Using a shot timer helps baristas refine their techniques, maintain consistency across different shots, and adjust their grind, dose, or tamping pressure if the results are not satisfactory. This is fundamental in delivering not just a drink, but a well-crafted espresso that meets customer expectations.