What does electromagnetic flow meter measure?
Electromagnetic flow meters (or magmeters) are a type of velocity or volumetric flow meter that operate pursuant to Faraday’s law of electromagnetic induction – which states that a voltage will be induced when a conductor moves through a magnetic field. Magmeters can detect the flow rate of conductive fluids only.
Where is electromagnetic flow meter used?
Electromagnetic Flow Meters, simply known as mag flow meter is a volumetric flow meter which is ideally used for waste water applications and other applications that experience low pressure drop and with appropriate liquid conductivity required.
What is the output of electromagnetic flow meter?
What is the Output Range of the Sensor? The sensor has a differential output. Its sensitivity is typically 150 microvolts/(mps) to 200 microvolts/(mps). Since the excitation current alternates its direction, the sensor output signal amplitude doubles.
Why do we use electromagnetic flow meter?
Magnetic flowmeters measure the velocity of conductive liquids in pipes, such as water, acids, caustic, and slurries. Magnetic flowmeters can measure properly when the electrical conductivity of the liquid is greater than approximately 5μS/cm.
Who invented the electromagnetic flow meter?
In 1952 the Dutch company Tobi-Meter introduced the first commercial magmeter. In 1962 the British scientist J.A. Shercliff published the “Theory of electromagnetic flow-measurement.” Today there are a few dominant global companies providing more than 200,000 magmeter instruments annually to all industries.
What are the difference between ultrasonic flow meter and electromagnetic flow meter?
Both magmeters and ultrasonic meters provide highly accurate flow readings for water and wastewater applications. However, the magmeters provide a higher level of accuracy and more flexibility.
What are the components of electromagnetic flowmeter?
Electromagnetic flowmeters are made up of a transmitter and a sensor. The sensor is placed inline to measure the induced voltage of a fluid as it flows through a pipeline. The transmitter then converts this voltage into a flow measurement. Effectively, the faster the fluid flows, the more voltage is generated.
How do you calibrate an electromagnetic flow meter?
To perform Master meter calibration:
- Place the master meter in series with the flow meter under test.
- Compare the readings of the master flow meter and flow meter using a measured volume of liquid.
- Calibrate the flowmeter under test to conform with the master flow meter calibration.
Which type of flowmeter is most accurate?
Coriolis mass flow meters produce the most accurate for most liquids but are expensive. They have the advantage of not needing any knowledge about the fluid being carried. Thermal mass flow meters are a less accurate but still direct measurement method. They do require knowledge of the fluid’s specific heat capacity.
What’s the difference between electromagnetic and ultrasonic?
Sound waves are mechanical waves whereas electromagnetic waves are not mechanical waves. Therefore, sound waves require a medium for their propagation whereas electromagnetic waves do not require a medium. This is the main difference between sound waves and electromagnetic waves.
Do magnetic flow meters require calibration?
Therefore, the electromagnetic flowmeter needs calibration. Ensuring accurate flow meter performance is an inestimable part of business planning and costing.
Do electromagnetic flow meters need to be calibrated?
Various types of instruments are usually used for data monitoring in industrial production, and electromagnetic flowmeter is one of the common instruments. However, a precise electromagnetic flowmeter needs to be calibrated to ensure the accuracy of its monitoring before it is officially put into operation.