Seeed 114991172 Grove - Water Flow Sensor YF-B2

Copper - A metal element with a chemical formula of CU. A excellent conductor of electricity and heat.

water - A chemical substance. Chemical formula H2O.

Coffee - A popular brewed drink using roasted coffee beans

speed - A measurement of how fast an object travels between two points

Hall - A room at the inside of an entrance of a house.

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