The magnetic flow meter was invented by Hans Gottlieb Friedrich Woltman in the early 1950s. He developed this technology to measure the flow of conductive liquids using electromagnetic principles. The design has since undergone various improvements and adaptations, becoming a widely used instrument in various industries for its accuracy and reliability.
it principle denpend on what kind of flow meter. example, magnetic flow meter, it use magnetic force to measuring or coriolis flow meter which is use vibrated capilary tube as sensor. or more info you might watch on youtube.
The basic principle of a magnetic flow meter is based on Faraday's law of electromagnetic induction. It measures the flow rate of conductive fluids by generating a magnetic field across the flow tube. As the conductive fluid flows through this magnetic field, it induces a voltage proportional to the flow velocity, which is then measured and converted into a flow rate reading. This technology is non-invasive and works well with various fluid types, provided they have sufficient conductivity.
One of the easiest ways to detect a magnetic field is with a length of conductive material attached to a voltage meter. The presence of a magnetic field causes an electrical current to flow through the conductor, thus causing a spike on the meter.
An electromagnetic flow meter is a flowmeter which uses the electromagnetic technology to determine the amount of volume flow though a pipe. View the Related Links section for a link with a video about this.
THE SYMBOL FOR Flow Meter is : FI as Flow Indicator
A DC clamp meter works by measuring the magnetic field produced by the flow of direct current in a conductor. When the clamp is placed around the conductor, it detects the magnetic field and converts it into a direct current measurement. This measurement is then displayed on the meter's screen.
The above is the symbol of flow meter.
A clamp on amp meter is used for this purpose. When amperage is present in a wire there will be a magnetic field generated around the wire. The clamp on amp meter measures this magnetic field and converts it to an amperage value that is read on the screen of the amp meter. No current flow, no magnetic field, no reading. A dangerous and non recommended way to check current flow is to open the circuit when the load is connected and operating. There will be a small arc that jumps across the gap when the circuit is opened. This is current flowing in the circuit.
One can recalibrate a flow meter by having a company or owning a flow meter supplier or using a flow meter lab. No matter what type of flow meter they need to be checked to see if they need to be recalibrated regularly.
The flow range of a gas flow meter is the range of flow rates that the meter is capable of measuring accurately. It typically includes a minimum and maximum flow rate that the meter can reliably detect and measure. It is important to ensure that the flow rates being measured fall within the specified flow range of the gas flow meter for accurate readings.
rota meter
I believe it depends on what kind of flow meter you are looking for. They can range from 19.99 and go up. The more expecive it gets the better the flow meter.