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| image title | Jar rain gauge |
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| caption | Precipitation is measured as the depth of water (rain or melted hail or snow) that would result over any area from which the precipitation was unable to drain or soak away. The usual rain gauge collects precipitation using a funnel, typically 100 mm or 127 mm (= 5 inches) in diameter, that feeds the precipitation into a narrow-necked jar. This is protected from direct sunlight to avoid evaporation. The measurement of the depth of water in the jar is converted into an equivalent depth for a receptacle of the same diameter as the funnel. See also Tipping rain gauge, MI015. |
| code | MI014 |
| Section | Meteorological instruments |
| Subsection | Surface-based instruments |
| image credit | © The Open University |
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