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2. Current meter - Wikipedia

   en.wikipedia.org/wiki/Current_meter

   Mechanical current meters are mostly based on counting the rotations of a propeller and are thus rotor current meters. A mid-20th-century realization is the Ekman current meter which drops balls into a container to count the number of rotations.

3. Water metering - Wikipedia

   en.wikipedia.org/wiki/Water_metering

   A velocity-type meter measures the velocity of flow through a meter of known internal capacity. The speed of the flow can then be converted into a volume of flow to determine the usage. There are several types of meters that measure water flow velocity, including jet meters (single-jet and multi-jet), turbine meters, propeller meters and mag ...

4. Vector measuring current meter - Wikipedia

   en.wikipedia.org/wiki/Vector_measuring_current_meter

   After having fabricated and testes several families of propellers, they found the best response in a dual propeller (two propellers fixed on an axle) sensor with two five-bladed, 30-degree pitch propellers with diameter of 22 cm. [1] The propellers are hard anodized, epoxy coated on the exterior, and protected by zinc anodes. They have been ...

5. Flow measurement - Wikipedia

   en.wikipedia.org/wiki/Flow_measurement

   Because they are used for domestic water measurement, piston meters, also known as rotary piston or semi-positive displacement meters, are the most common flow measurement devices in the UK and are used for almost all meter sizes up to and including 40 mm (1 + 1 ⁄ 2 in). The piston meter operates on the principle of a piston rotating within a ...

6. Palmer-Bowlus Flume - Wikipedia

   en.wikipedia.org/wiki/Palmer-Bowlus_Flume

   Flow in the Palmer-Bowlus Flume transitions from a circular bottom section to a raised trapezoidal throat and then back - accelerating sub-critical flow (Fr~0.5) to a supercritical state (Fr>1) to develop the level-to-flow relationship. The simplified free-flow discharge can be summarized as = Where Q is flow rate

7. Miner's inch - Wikipedia

   en.wikipedia.org/wiki/Miner's_inch

   The miner's inch is a method of measuring the amount of flow a particular water supply system (such as a flume or sluice) is capable of supplying. The miner’s inch measures the amount of water that would flow through a slot of a given area at a given pressure (for example, at a head of 6 inches of water, or 1.5 kPa.) In miner's inch the word ...