What is rain gauge sensor?

A rain gauge sensor, often referred to as a pluviometer or simply a rain sensor, is a device used to quantify the amount of rainfall or precipitation in a specific location over a designated period. Its primary function is to collect and measure rainwater within defined parameters of size and height.
What are the distinctions between a rain gauge and a hygrometer?

A rain gauge measures the amount of rainfall accumulated over a specific period. It typically comprises a cylindrical or funnel-shaped container designed to collect rainwater. This water is then measured, often using a graduated vessel, to determine the total precipitation for the recorded timeframe.