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A rain gauge which is also known as udometer, pluviometer, ombrometer, and hyetometer, is an instrument used by meteorologists and hydrologists to gather and measure the amount of liquid precipitation in a predefined area, over a set period of time.[1] It is used to determine the depth of precipitation (usually in mm) that occurs over a unit area and measure rainfall amount.
- ^ Leong, Goh Cheng (1995-10-27). Certificate Physics And Human Geography; Indian Edition. Oxford University Press. p. 94. ISBN 978-0-19-562816-6.