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Dwyer Series IEFS

Dwyer Instruments Series IEFSInsertion Electromagnetic Flow Sensor
No Moving Parts, Hot-Tap Option, 3 to 48" Field Adjustable Insertion

The Series EFS2 Insertion Electromagnetic Flow Sensor is designed for pipe sizes from 1 to 12" and comes in three different materials (stainless steel, brass and PVC). There are a variety of custom fittings to choose from to ensure accurate fitting in the pipe. The Series EFS2 is useful for any applications where moving parts would be a problem, such as dirty liquids. It can handle applications where there are rapid changes in viscosity and flow. Other applications include small pipes and chemical metering pumps.

The IEFS is a liquid flow meter that uses a magnetic field to measure flow. As conductive fluids flow through the magnetic field, a voltage is generated which is measured and translated into a pulse frequency output signal. This signal can then be used with the Series BAT to produce a 4 to 20 mA analog signal, or the Series RTI to display rate and total.

• Conductive Liquids
• Municipal
• Industrial
• Irrigation

• Series BAT, Blind Analog Transmitter, converts pulse output to 4 to 20 mA analog output. Unit is loop powered, fits on the enclosure of the meter, and is field spannable.
• Series RTI, Rate Total Indicator, converts pulse output to 4 to 20 mA analog output with local flow rate and totalization display. Unit is loop powered, can fit on the enclosure of the meter, and provides a high/low flow alarm.
• Series PWD, Pulse Divider, for use with pacing electronic metering pumps. Unit divides the input frequency to any number from 1 to 9999 with the use of rotary switches to suit a number of metering pump inputs.

  • Service: Compatible clean or dirty non-coating, conductive liquids.
  • Range: 0.28 to 20 ft/s (0.08 to 6.09 m/s).
  • Wetted Materials:
    Body Shaft/Fitting: 316 SS or brass;
    Electrodes: Hastelloy®;
    Electrode Cap: PVDF;
    Valve Assembly: (IEFS-1XX) Bronze (SS optional) with bronze ball valve;
    O-ring: EPDM.
  • Accuracy: ±1% FS.
  • Temperature Limits:
    Process: 32 to 200°F (0 to 93°C);
    Ambient: 0 to 160°F (-17 to 72°C).
  • Process Connection:
    IEFS-0XX: 1-1/2" male NPT;
    IEFS-1XX: 2" male NPT.
  • Pressure Limit: 200 psi (13.8 bar).
  • Output: Current sinking, square wave pulse, opto-isolated, 550 Hz @ 20 ft/s, 30 VDC @ 6 mA max.
  • Power Requirements: 12 to 25 VDC @ 250 mA; Low Power: 12 to 25 VDC @ 40 mA.
  • Electrical Connection: Terminal block.
  • Conductivity: ≥20 microSiemens/cm.
  • Enclosure Material: Housing: Die-cast powder-coated aluminum.
  • Enclosure Rating: NEMA 4X (IP66).
  • Weight: IEFS-0SX: 6 lb (2721 g); IEFS-0LB: 12 lb (5443 g); IEFS-1XX: 15 lb (6804 g).
EXAMPLE IEFS 0 S B BAF Series IEFS-OSB-BAF Insertion Electromagnetic Flow Sensor, no hot tap, 3 to 10" pipe, brass, 2" brass adapter fitting 
SERIES IEFS         Insertion Electromagnetic Flow Sensor
      No hot tap
Hot tap
SIZE     S
    3 to 10" pipe
10 to 48" pipe
316 SS
2" Brass adapter fitting
Brass BSPT adapter
12" Extension
Low power
No valve assembly
Old style adapter
Reverse flow output
2" 316SS adapter fitting
SS BSPT adapter
316SS valve assembly