What instrument is used to measure the intensity of rainfall?

The instrument specifically designed to measure the intensity of rainfall is the rain gauge. This device collects and measures the amount of liquid precipitation over a set period of time, allowing meteorologists and scientists to determine rainfall rates efficiently. The rain gauge can provide data on both the total volume of rain and the rate at which it falls, which is essential for understanding weather patterns and predicting potential flooding scenarios.

In contrast, a barometer measures atmospheric pressure, which is not directly related to rainfall intensity. An anemometer is used for measuring wind speed and does not provide information on precipitation at all. A thermometer measures temperature, which is another important weather variable but is unrelated to the quantification of rainfall. These distinctions clarify why the rain gauge is the appropriate choice for measuring rainfall intensity.