![]() Two electrodes are fitted inside the tube to detect the voltage generated by the conducting fluid. The flow meter typically consists of two electromagnetic coils that are mounted on opposite sides of a non-magnetic measuring tube. This principle is used in the electromagnetic flow meter to measure the volume flow rate of the fluid. Boiler House Instrumentation And Controls.Explosion Proof Indicator/Rate/Totalizer.Explosion-Proof Temperature Transmitter.Reliable, cost effective connection system for these sensors. With theĮxpanded use of industrial automation systems however, the number of sensors used have increased dramatically, driving the need for a Such as the Mil-C-5015 or MIL-C-38999 connectors that provided high reliability and secure connections but at a high price. The FMG200 series offer flow rates down to 0.38 LPM (.1 GPM).Ī digital display with relay and analog outputs are standard.įor many years sensors used in high reliability applications, such as those used in aerospace and military applications, relied upon connectors These low flow mag flow meters are also in line and offer 3/8" to ½" NPT connections. The magmeter cannot distinguish entrained air from the process fluid therefore, air bubbles will Theseįlowmeters are very sensitive to air bubbles. In vertical pipe runs, flow should always run up and not down. Of straight run upstream and 1 to 2 diameters downstream is recommended. In line flow meters do not require as much straight pipe as the insertion styles. Omega's FMG-600 series in line flange and wafer style meters offer higher flow rates of 1 to 10 m/sec. The insertion styles offer aĠ.5 to 1% accuracy. They can be as accurate as 0.5% of the flow rate. The in line type magnetic flow meters offer a higher accuracy. The installation manual on how to best ground the magnetic flow meter. The fluid carries significant levels of static electricity that must be grounded for best magmeter performance. Magnetic flow sensors are sensitive to electrical noise which is present in most piping systems. If there is any question that the pipe is absolutely full, mount the sensor at a 45 to 135 angle. The insertion magmeter is sensitive to air bubbles at the electrodes. Or more upstream to insure a fully developed turbulent flow profile. Some situations may require 20 pipe diameters Select a location for the sensor where the flow profile is fully developed and not affected by any disturbances.Ī minimum of 10 pipe diameters of straight run upstream and 5 diameters downstream is recommended. Minimum conductivity: 5 to 20 microSiemens/cm Type flowmeters are ideal for large pipe applications. The FMG3000 series offers corrosion resistant materials for pipes from 0.5 to 8". The FMG980 Series offers an analog output with an integralĭisplay for flow rate and totalization. The FMG980 Series are designedįor 2" to 48" in size with a flow rate of 0.05 to 10 m/sec (0.15 to 33 ft/sec). Insertion type meters offered by Omega Engineering have a standard 2" NPT or fit into a specific size fitting. With insertion-style flowmeters, the magnetic field radiates outward from the inserted probe (Figure 2). If this magnetic field is considered as the measuring element of the magneticįlowmeter, it can be seen that the measuring element is exposed to the hydraulic conditions throughout the entire cross-section of the flowmeter. Throughout the entire cross-section of the flow tube (Figure 1). (which in this instance is the distance between the electrodes).In the case of wafer-style magnetic flowmeters, a magnetic field is established That signal voltage (E) is dependent on the average liquid velocity (V) the magnetic field strength (B) and the length of the conductor (D) As applied to the design of magnetic flowmeters, Faraday's Law indicates Must be electrically conductive for the Faraday principle to apply. To apply this principle to flow measurement with a magnetic flow meter, it is necessary first to state that the fluid being measured Induced across any conductor as it moves at right angles through a magnetic field is proportional to the velocity of that conductor. What is the working principle of magnetic flow meter?įaraday's Law The operation of a electromagnetic flowmeter is based upon Faraday's Law, which states that the voltage Is the fluid chemically compatible with the flow meter wetted parts?.What is the minimum and maximum process temperature?.What is the minimum and maximum process pressure?.What is the minimum and maximum flow rate for the flow meter?.Do you require an integral display or remote display?.Is the fluid conductive or water based?.
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