A rain gauge consists of an outer 13cm diameter cylinder and an inner cylinder with a jar. Rain is collected in the jar by means of a funnel which has a tapered end so that rain cannot easily evaporate. The rain gauge is sited in open space to receive rain from all angles. It must be located away from buildings and trees that may shelter the raindrops. It is sunk into the ground for stability and its rim is 30cm from the ground to prevent water from splashing into it from the ground.
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