Which component is specifically used for measuring temperature in pneumatic systems?

The Bourdon tube is specifically designed to measure pressure, typically in various mechanical applications, including pneumatic systems; however, the context of the question is focused on temperature measurement. While the Bourdon tube is an excellent pressure-measuring tool, it does not function for measuring temperature.

In the context of measuring temperature in pneumatic systems, the correct choice is the thermocouple. A thermocouple consists of two different metal wires joined at one end, which generates a voltage that can be correlated to temperature. This makes it an effective tool for temperature measurement in various applications, including those involving gases under pressure.

The Venturi tube and orifice plate serve primarily as flow measurement devices, determining the flow rate of a fluid based on pressure changes rather than measuring temperature. Thus, they do not serve the purpose of measuring temperature in pneumatic systems. Understanding these differences is crucial for selecting the appropriate instruments in industrial systems.