By multiplying this velocity with the cross-sectional area of the pipe, it accurately determines the volumetric flow rate. Leveraging the known magnetic field strength and the induced voltage, the flow meter calculates the average fluid velocity. Voltage Measurement: The flow meter boasts electrodes, often constructed from non-corrosive materials such as stainless steel or titanium, which come into contact with the conductive fluid and measure the induced voltage.įlow Rate Calculation: The flow meter’s electronics gather and process the voltage measurements from the electrodes. This induced voltage, known as electromotive force (EMF), is directly proportional to the fluid’s velocity. Voltage Induction: As per Faraday’s Law, when the conductive fluid crosses magnetic field lines, a voltage is induced within the fluid. As the fluid flows perpendicular to the magnetic field lines, it intersects across the magnetic field. Magnetic Field Generation: A strong, constant magnetic field is generated within the flow meter’s measuring tube or pipe, typically achieved with coils or permanent magnets.įlow of Conductive Fluid: The conductive fluid to be measured is guided through the magnetic field. High Frequency (-HF): Pulse width 1.1 ms, min/max frequency, 3 to 150 hzĮmpty Pipe Detection: Hardware/ software, conductivity-basedĮlectrical Connection (FMG810 Only): 5-pin male circular with 6 m (20') cableįor a complete list of displays in alternate Engineering Units consult the full specification page via the link "Specs" above.Here’s a step-by-step breakdown of how Electromagnetic Flow Meters operate: Standard Pulse Rate: 1 unit/pulse out, pulse width of 10 ms depending on unit selection Signal: Current sinking pulse, opto-isolated, 32 Vdc max at 10 mA max Estimated life is 1 to 2 years depending on usage NOTE: Using an unregulated power supply >18 Vdc may damage the meter due to AC line input voltage fluctuationįMG801/802/803: 6 each “AA” alkaline cells (included), replaceable. Units total: Cubic Feet, Liters, Mega-liters, Cubic Metersm Liters/Minute, Cubic Meters/MinuteįMG810: 10 to 30 Vdc 60 mA max (15 mA average) Units Rate: Gallons/Minute, Cubic Feet/ Second, Acre-Feet, Acre-Inch, Gallons, Gallons x 1000, Cubic Feet/Minute, Liters/Second Materials Body: Glass-filled polypropyleneĮlectronics Housing: Die-cast aluminum, powder-coated Operating Temperature Range: -12 to 54☌ (10 to 130☏), -40 to 80☌ (-40 to 176☏) non-operatingĪccuracy: ☑% of reading (between 10% and 100% of max flow) ☓% of reading (between cutoff and 10% of max flow) Pressure: 150 psi or 10.3 bar working pressure 21☌ (70☏) *Includes Omega NPT fitting kit on 2 and 3" models.įittings: 1 NPTF, 2 or 3" flange clamps with 2 or 3 NPTF fitting kit The batteries are user replaceable with an approximate 1 to 2 year life depending on usage. The FMG800 Series (FMG801-803) is a battery-operated unit for use when pulse output is not required. The FMG810 Series is externally powered via a 5-pin connector cable which also provides pulse output for use with a variety of Omega displays and controls for remote reading, data logging, pulse-to-analog conversion, and telemetry applications. In the event of DC power loss, or when changing batteries, the FMG800 will retain internal settings and flow total. The FMG800 Series is used for tracking flow rate and total flow in usage monitoring applications including wells, industrial wastewater, heap leach mining discharge, cooling tower deduct, turf, landscape, and other water reclamation applications. Flow rate and total can be displayed in a variety of units, but must be factory programmed. A hinged polyethylene cover is included that protects from dust and UV rays, while permitting easy access to the flow rate and total display. Since there are no bearings or propeller to wear out, maintenance and repair costs are kept to a minimum and it tolerates high flows without damage. The FMG800 Series is resistant to wear from sand and debris found in ground or surface water. The FMG800 Series can be used in piping configurations where there is little space between the meter and an elbow or valve. With no moving parts, the magmeter permits unobstructed flow, minimizing flow disturbances and straight pipe requirements. It is light weight and easy to install or remove from the pipe for inspection*. The polypropylene flow tube offers corrosion resistance to a wide range of chemicals and fertilizers. The FMG800 Series is a full-bore, plastic-bodied electromagnetic flow meter designed for flow and usage monitoring applications in 1, 2 and 3 inch pipe.
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