Which device is used to measure temperature in fire situations?

The thermocouple is the correct device used to measure temperature in fire situations due to its ability to withstand extreme temperatures and offer rapid response times. It consists of two different types of metal wires joined at one end, which create a voltage that corresponds to temperature differences. This makes thermocouples highly effective in environments like fires, where quick and accurate temperature readings are crucial for safety and operational decisions.

In contrast, a thermometer, while useful for measuring temperature in general, typically cannot handle the high temperatures present in fire scenarios. A barometer measures atmospheric pressure and is not designed to gauge temperature, and a hygrometer measures humidity levels, which, although relevant in some fire contexts, does not measure temperature directly. Therefore, the thermocouple’s unique properties make it the preferred instrument for temperature measurement in the context of fire situations.