Question

Pick out the most suitable instrument for measuring temperature in the range of \(-40^\circ C\) to \(425^\circ C\)

• A. Bimetallic thermometer
• B. Radiation pyrometer
• C. Mercury thermometer
• D. Infrared thermometer

Hint:

For mechanical, wide-range measurement → use bimetallic thermometers.

Answer 1

The Correct Option is A

Bimetallic thermometers cover a wide temperature range and are rugged.
Mercury thermometers have lower upper limits, pyrometers used at high temperature only.