Electromagnetic Flow Meter

FMG550-Series Hot-Tap Metal Insertion Electromagnetic Flow Meter

The FMG-550 Series Electromagnetic Flow Meter are heavy-duty, high-performance sensors in an adjustable, insertion configuration that can be used with a ball valve for hot-tap installations. This insertion-style flow sensor has no moving parts and is constructed of corrosion-resistant materials to provide long-term reliability with minimal maintenance costs.

The FMG-550 Series is versatile and simple-to-install, delivering reliable flow measurement over a wide dynamic range. Pipe sizes range from 2 to 48″. Omega’s FMG-550 magmeters offer frequency or current outputs. The blind transmitter (4 to 20 mA output) is available for long distance signal transmission. The empty pipe detection features a zero flow output when the electrodes are not completely wetted. The frequency output is bi-directional while the 4 to 20 mA output can be set for uni- or bi-directional flow. The 4 to 20 mA output is factory spanned. Other factory configurations available, see “Notes” below for ordering instructions.

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Feature

  • Hot-Tap Version for Installation and Service Without System Shutdown
  • Diagnostic Features Using Colored LED Lights
  • Optional Detachable Waterproof Cable
  • Output Choices of Frequency or 4 to 20 Ma

Specifications

  • Wetted Materials: 316 L stainless steel body and electrodes, PVDF insulator, O-rings (FPM standard), 4-conductor shielded cable, PVC jacket (fixed cable models) or watertight rubber cable with connector on “-SUB” models
  • Power: 4 to 20 mA (24 Vdc nominal, 21.6 to 26.4 Vdc max, 22.1 mA maximum), frequency (5 to 24 Vdc nominal, 5 to 26.4 Vdc max, 15 mA max), reverse polarity and short circuit protected pipe size of DN50 to DN1200 (2 to 48″)
  • Flow Range: 0.05 m/s (0.15 ft/s) min, 10 m/s (33 ft/s) max
  • Linearity: ±1% reading + 0.01 m/s (±1% reading + 0.033 ft/s)
  • Repeatability: ±0.5% of rdg @ 25°C
  • Minimum Conductivity: 20 µS/cm
  • Accuracy: <±2% of measured value in reference conditions where the fluid is water at ambient temperature, the appropriate upstream and downstream distances are observed, the sensor is inserted at the correct depth, and there is a fully developed flow profile which is in compliance to ISO 7145-1982 (BS 1042 section 2.2).
  • Electrical Current Output: 4 to 20 mA, programmable and reversible, loop
  • Accuracy: 32 µA max error (at 25°C @ 24 Vdc)
  • Temperature Drift: ±1 µA per °C max
  • Power Supply Rejection: ±1 µA per V
  • Isolation: Low voltage <48 Vac/dc from electrodes and auxiliary power
  • Maximum Cable: 300 m (1000′)
  • Maximum Loop Resistance: 300 ?
  • Error Condition: 22.1 mA frequency output
  • Maximum Pull-up Voltage: 30 Vdc
  • Short-Circuit Protected: <30 V @ 0 ? pull-up for 1 hour, reverse polarity protected to -40 V for 1 hour, over-voltage protected to 40 V for 1 hour
  • Maximum Current Sink: 50 mA, current limited Temperature/Pressure Ratings
  • Storage Temperature: -15 to 70°C (5 to 158°F) in non-icing conditions Operating Temperature Ambient: -15 to 70°C (5 to 158°F) in non-icing conditions
  • Media: -15 to 85°C (5 to 185°F)
  • Maximum Operating Pressure: 20.7 bar @ 25°C (300 psi @ 77°F)
  • Hot-Tap Installation Requirements:
  •     Maximum Installation Pressure: 20.7 bar (300 psi)
  •     Maximum Installation Temperature: 40°C (104°F) Hot-tap installation at temperatures that are greater than 40°C (104°F) or with hazardous liquids are not permitted with this product.
  •     Connector: NEMA 6P (IP68)
  •     EN 61326: Immunity and emissions for control equipment

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