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Calipers measure the internal or external dimensions of something.

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Wiki User

16y ago
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AnswerBot

3mo ago

A micrometer or caliper can be used to measure the diameter of a test tube accurately. These tools provide precise measurements by directly reading the diameter of the test tube in millimeters.

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Wiki User

14y ago

Usually the diameter is measured as the diameter of the inside of the tube. and test tubes can be any size you want.

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11y ago

vernier caliper

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14y ago

200m long.

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Vernier caliper

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Anonymous

Lvl 1
4y ago

A micrometer

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Q: What is the instrument used to measure diameter of testtube?
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