udometer

n. device for measuring the amount of precipitation in a given period of time

A rain gauge (also known as an udometer or a pluviometer) is a type of instrument used by meteorologists and hydrologists to gather and measure the amount of liquid precipitation (as opposed to solid precipitation that is measured by a snow gauge) over a set period of time.Most rain gauges generally measure the precipitation in millimeters. The level of rainfall is sometimes reported as inches or centimeters.Types of rain gauges include graduated cylinders, weighing gauges, tipping bucket gauges, and simple buried pit collectors. Each type has its advantages and disadvantages for collecting rain data.
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Noun
1. gauge consisting of an instrument to measure the quantity of precipitation
(synonym) rain gauge, rain gage, pluviometer
(hypernym) gauge, gage

(n.)
A rain gauge.
  

n.
مقياس الماء, پاني ناپ