What type of sensor measures air temperature in RAWS?

The selection of a thermistor as the correct answer is based on its specific function and characteristics in measuring air temperature. A thermistor is a type of temperature sensor that operates on the principle that its electrical resistance changes with temperature. This feature allows it to accurately measure air temperature by providing precise readings that are crucial for environmental monitoring in Remote Automated Weather Stations (RAWS).

Thermistors are particularly beneficial in RAWS applications because of their quick response time and high sensitivity to temperature changes, making them ideal for collecting real-time data in varying weather conditions. Their ability to provide consistent and accurate temperature readings is essential for weather forecasting, climate research, and other meteorological applications.

The other sensor types listed have distinct roles that do not involve directly measuring air temperature. A barometer is designed to measure atmospheric pressure, a hygrometer measures humidity levels, and an anemometer gauges wind speed. Each of these instruments plays an important role in the overall weather monitoring process but is not suited for temperature measurements like a thermistor.