Timers are used in coffee makers for various applications. The most common applications are: timing the brewing, starting the coffee maker, or turning it off, timing coffee grinders, as a way to measure the amount of coffee beans used, timing the extraction as a way of controlling the brewed coffee volume.  

A timer is a specialized type of clock for measuring time intervals. A timer which counts upwards from zero for measuring elapsed time is often called a stopwatch, a device which counts down from a specified time interval is more usually called a timer. A simple example is an hourglass. Some timers sound an audible indication that the time interval has expired. Time switches, timing mechanisms which activate a switch, are sometimes called “timers”.