A bimetallic stemmed thermometer should be 2-3" far into food to give an accurate reading.
- The probe of the bimetallic-coil thermometer needs to be inserted all the way into the sensor device for an accurate temperature reading " (usually 2-3").
- These thermometers have a coil in the probe made of two distinct metals that are linked together and have differing rates of expansion. When heated, this coil, which is attached to the temperature indicator, expands.
- This thermometer senses temperature from its tip up the stem for 2 to 2 ½". In other words, if the temperature at the tip of the probe is 170°F and the temperature 2 inches above the tip is 180°F, the thermometer will read roughly 175°F since the resultant temperature is an average of the food-contact temperatures along the sensing portion.
- These thermometers are offered in "instant-read" and oven-safe varieties.
Therefore, the correct answer is 2-3".
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