Water Flow Meter Principle

Conversely decelerating fluid moves away from the point of peak amplitude as it exits the tube.

Water flow meter principle.

The induced voltage e is directly proportional to the velocity v of the fluid moving through the magnetic field b. Several water flow meter technologies are available for selection depending on the water measurement applications budgetary terms and maintenance requirements. A flow meter or flow sensor is an instrument used to measure linear nonlinear mass or volumetric flow rate of a liquid or a gas. Rate of flow of water is measured as liters per hour or cubic meters.

Each of these water flow meter types has a unique principle of operation overall cost of ownership and specific application benefits. Coriolis flow meter principles the basic operation of coriolis flow meters is based on the principles of motion mechanics. 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 largest coriolis flow meter that is currently available has a maximum flow rating of 25 000 lb min 11 340 kg min and is equipped with 6 in.

The piston meter operates on the principle of a piston rotating within a. The sen sor signa l is. Velocity meters measure the velocity of the water flow and convert it into the amount of water flow. They operate based on the principle that water passing through a known cross sectional area having a measured velocity is proportional to the volume of water flow.

When larger flow rates must be measured two or more flow meters mounted in parallel are required. Water flow sensors are installed at the water source or pipes to measure the rate of flow of water and calculate the amount of water flowed through the pipe. When choosing flowmeters one should consider such intangible factors as familiarity of plant personnel their experience with calibration and maintenance spare parts availability and mean time between failure history etc at the particular plant site. A mas s flow meter operating on the corioli s principle c ontain s a v ibra ting tube i n which a fluid flow caus es changes i n frequen c y phase s hift or am plitude.

As fluid moves through a vibrating tube it is forced to accelerate as it moves toward the point of peak amplitude vibration.