The instrument specifically designed to measure liquid precipitation is the rain gauge. This device collects and measures the amount of rain that falls over a specific period of time, providing readings in millimeters or inches. Rain gauges typically consist of a container with a funnel that directs rainwater into a measuring tube, allowing for accurate determination of precipitation levels. This makes it essential for meteorological studies, agriculture, and managing water resources.
In contrast, the other instruments serve different purposes. A thermometer measures temperature, a buret is used for precise liquid dispensing in titrations and other chemistry applications, and a barometer measures atmospheric pressure. Each of these tools plays a critical role in their respective fields, but none are designed for measuring precipitation like a rain gauge.