Measuring Equipments
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Food Thermometers come in
several types and style, and vary in level of technology and price.
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Single-Use Temperature Indicators
One of the most
recent developments in the retail food market is the
emergence of disposable temperature indicators.
Speed
This Temperature Indicator takes roughly 5 - 10
seconds
to register the correct temperature.
Placement
Approx.
1/2" deep in the food, follow manufacturer's
instruction.
Usage Consideration
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Designed to be
used only once
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Designed for
specific temperature ranges , example 160 -
170 OF.
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Should only be used
with food for which they are intended.
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Temperature-sensitive
material changes color when the desired temperature is
reached.
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Liquid-filled Thermometers
Also called
"spirit-filled" or "liquid in glass" thermometers,
these thermometers are the oldest kind of food
thermometer used in home kitchens. They have either
metal or glass stems. As the internal temperature of
the food increases, the colored liquid inside the
stem expands and rises to indicate the temperature
on a scale.
Speed
It takes roughly 1-2 minutes to indicate the
temperature on the scale.
Placement
At least 2" deep in the thickest part of the food .
Usage Consideration
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Used in roasts,
casseroles, and soup.
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cannot measure
thin foods.
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Can
remain in food while it's cooking
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Possible breakage of glass stem while
in food.
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Heat conduction of metal stem can
cause false high reading.
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Some models can be calibrated; check
manufacturer's instructions.
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Pop-Up Timer
Commonly used in turkeys and roasting
chickens since 1965.
The "pop-up" temperature device is
constructed from a food approved nylon. The inside
contains a stainless steel spring and firing
material until it melts, releasing the stem, which
is then "popped up" by means of the spring.
This indicates that the food has
reached the final temperature for safety and
doneness.
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Candy/Jelly/Deep Fry Thermometers
These thermometers
will measure temperatures ranging from 100 to 400
OF.
They are used to
measure the extra-high temperatures required of
candy and jelly making, as well as frying with hot
oil.
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