The diameter of a rain gauge varies depending on the specific model and its intended use. There is no single standard diameter for all rain gauges.
Different rain gauge sizes are designed with varying rain catchment areas, which directly relates to the diameter of the opening at the top. The size of the opening is crucial for accurately collecting rainfall for measurement.
According to information from Barani Design, common rain gauge sizes have the following opening diameters:
Rain Gauge Opening Diameters
| Rain Catchment Opening Area (cm²) | Rain Opening Diameter (cm) |
|---|---|
| 325 | 20.3 |
| 400 | 22.6 |
| 500 | 25.2 |
| 800 | 31.9 |
These examples illustrate that the diameter can range from approximately 20.3 cm to 31.9 cm for these specific models, with other sizes and diameters also existing. Therefore, when asking about the diameter of a rain gauge, it's important to specify the particular model or size.
