Noun
kitchen timer (plural kitchen timers)
A device that can be set for a number of minutes (usually up to one hour) that sounds an alarm such as a bell or buzzer when the specified amount of time has elapsed; commonly used when cooking or baking.
My recipe for dealing with anger and frustration: set the kitchen timer for twenty minutes, cry, rant, and rave, and at the sound of the bell, simmer down and go about business as usual. Phyllis Diller