Many Thanksgiving turkeys are outfitted with a wonderful little piece of technology that tells you, in a very straightforward manner, when the turkey is ready to come out of the oven: the pop-up timer.
Pop-up timers are pretty simple machines. They’re normally composed of a pop-up stick (usually plastic) attached to a spring and held in place by a blob of food-grade soft metal or wax at the bottom of the timer. These three parts are held in a plastic casing. If you’re wondering if the turkey is done, the timer gives you a “yes” or “no” answer. When the turkey is done cooking, the indicator stick pops up. If you peek in the oven and the stick hasn’t popped up yet, the turkey’s not done. It’s fool-proof.
Pop-up timers are pretty simple machines. They’re normally composed of a pop-up stick (usually plastic) attached to a spring and held in place by a blob of food-grade soft metal or wax at the bottom of the timer. These three parts are held in a plastic casing. If you’re wondering if the turkey is done, the timer gives you a “yes” or “no” answer. When the turkey is done cooking, the indicator stick pops up. If you peek in the oven and the stick hasn’t popped up yet, the turkey’s not done. It’s fool-proof.
How does the timer issue its proclamations with such concrete certainty? Â Depending on who you ask, turkey is done when it reaches 165-180 degrees Fahrenheit. The trick is holding the pop-up stick in place with a wax or metal that will melt somewhere in that temperature range. When the correct temperature is reached, the melted anchor frees the pop-up stick and the spring launches the stick up into its “Hey, the turkey is done!” position.
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