Evaporimeters
The Hook gauge evaporimeter measures the rate of evaporation by the change in level from a free water surface in a pan or tank. It is used by meteorologists and water engineers throughout the world, especially in hot, arid countries where water conservation is of vital importance.
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Hook Gauge Still Well
The Hook gauge evaporimeter measures the rate of evaporation by the change in level from a free water surface in a pan or tank. 
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