Magnetic-induction flow meter

Various methods exist to accurately proportion syrup and water, though the most popular current system uses flow meters. The syrup is usually dosed though a mass flow meter and the water is dosed volumetrically using a magnetic induction flow meter. This allows for density variations within the syrup... 

Two main types of volumetric filler exist. In the first type, a predetermined volume of liquid can be dosed using either a magnetic inductive volumetric flow meter or a mass flow meter. Alternatively, measuring cylinders can be used that incorporate a level probe. The product is fed to a set level in the metering cylinder, at which point the flow valve is closed off from the supply tank. A typical can filler operating at 1,500 cans of 330 ml capacity per minute will fill as per the supply contract within 2.5 ml. However, a standard deviation for a volumetric filler as low as 0.58 ml has been quoted. As with the probe filler, these fillers are fitted with electro-pneumatic valves, enabling accurate control of the... 

The control for flow, metering, and overflow of liquids, as well as the draining of the reaction vessel is best performed by photosensors. The agitation of the reaction vessel (shake, stir, rotation) can be monitored by magnetic induction deduced from the moving part of the reactor and not from its drive. 

Faraday s law of induction, E = where E is the induced electric field, V the velocity of motion, and B the intensity of magnetic induction, is the basis for at least two types of electromagnetic flowmeters. In such flowmeters, a uniform magnetic induction is established transverse to the flow in a pipe and the flow of the metered fluid generates a potential difference at suitable detecting electrodes. 

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