Temperature Measuring Devices Using Two Metals

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Question:

Two temperature measuring devices that use two different metals to measure temperature are? Select all that apply.

Bi Metallic Thermometers Resistive Temperature Detectors Thermocouples Thermisters

Answer:

The two temperature measuring devices that use two different metals to measure temperature are:

  1. Bi Metallic Thermometers - These devices use two different metals that expand at different rates when heated, causing the bimetallic strip to bend and indicate the temperature.

  2. Thermocouples - These devices consist of two different metals joined at one end. When the junction is heated or cooled, it produces a voltage that can be correlated to temperature.

The other options, Resistive Temperature Detectors (RTDs) and Thermistors, use changes in resistance of a single material to measure temperature, rather than two different metals.