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Hello:
We are trying to develop a lab experience building an electromagnetic
liquid flow meter 'magmeter'. We know that the operation of a magnetic
flowmeter is based upon Faraday's Law, which states that the voltage induced
across any conductor as it moves at right angles through a magnetic field is
proportional to the velocity of that conductor.
The liquid is salted water flowing at 1 m/s speed.
As a tube, there is an hypodermic syringe (1.25 cm diameter), with two
conductive sensors in oposite sides.
The magnetic field is provided by a 300 turns coil reeled on a TV flyback
ferrite nucleus, with a trasversal area of 1.5 cm2.
The driving current is 2 A alternate current (50 Hertz).
In the ferrite nucleus, there is a 1.25 cm gap, wide enough to hold the
tube (hypodermic syringe) inside it.
We expected an induced voltage, suitable to be observed in an osciloscope,
but we can´t measure any useful signal.
Has somebody carried out a similar experience? . Any suggestion?
My best regards.
Roberto
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