Quick Answer: The Screw Gauge Micrometer is a precision instrument for measuring the diameter of thin wires, the thickness of small sheets and other small dimensions in physics practicals.
Last updated: October 2026
Key Features
Measures thin wire diameter and small sheet thickness
Object is held between the anvil and spindle, with the circular scale on the thimble
Teaches pitch, least count, zero error and main and circular scale reading
Repeat readings give mean values and reduce random error
About This Product
With the anvil and spindle cleaned and the zero checked, the object is placed between them and the thimble turned slowly until it is held lightly. Students read the main scale on the sleeve and the circular scale on the thimble, apply least count and zero error correction, and repeat at different points to find a mean. The spindle is never overtightened. The Screw Gauge Micrometer is available for supply within India and for export to Bosnia and Herzegovina, Vanuatu, Iceland, Namibia, Kenya and Botswana.
Frequently Asked Questions
Q1. Why is the zero checked first? If the scale does not read zero when the anvil and spindle touch gently, that zero error is applied as a correction to each reading.
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