The principle of operation of the rain water gauge float is when rain water through the funnel and rain water that supports receiving rain water into the water tank. The water in the tank is rain water will be higher. When the water level up to the top of the siphon tube. Water will flow out of the tank, rain water through a hose siphon rain water tank water level is decreased. Float float down. The pen will reduce down until the point where the siphon tube system stop working. Makes it possible to measure the quantity of rain accumulation over time, according to which, for example, the graph display of measuring rain gauge rain water with a float with a 30-hour period of rain quantity equal to 53.8 mm etc
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