timer

a device that measures time, especially for a specific period or event

cronómetro, temporizador

• set a timer

Collocations timer alarm · oven timer

• She set the kitchen timer for 30 minutes.

  Ella puso el temporizador de la cocina en 30 minutos.

a person who times races or events in sports and competitions

cronometrador, juez de tiempo

• act as a timer

• He acts as the official timer for the marathon.

  Él actúa como cronometrador oficial para la maratón.