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Dwyer Series EFS2 Electromagnetic Flow Sensor

Series EFS2Insertion Electromagnetic Flow Sensor
No Moving Parts, Durable, Easy Installation & Maintenance

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 EFS2 is a liquid flow meter that uses the conductivity of fluids to measure flow rate. Liquid flow through its magnetic field produces a voltage that is measured and translated into an output signal. It has a pulse frequency output which can be used with the Series RTI to indicate flow rate and total, as well as the Series BAT signal converter which provides an analog signal.

• Industrial Process
• Chemical Metering Pumps
• Fertigation

• 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 fields 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, fits 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:
    Sensor: 316 SS, brass or PVC;
    Electrodes: Hastelloy®, metal;
    Electrode Cap: PVDF;
    O-ring: EPDM (fluoroelastomer optional).
  • Accuracy: ±1% FS.
  • Temperature Limits:
    Process: Brass/SS: 32 to 200°F (0 to 93°C); PVC: 32 to 130°F (0 to 55°C);
    Ambient: 0 to 160°F (-17 to 72°C).
  • Pressure Limits:
    Brass/SS: 200 psi (13.8 bar);
    PVC: 150 psi (10 bar).
  • Process Connection: See Series EFF.
  • Output: Current sinking, square wave pulse, opto-isolated, 550 Hz @ 20 ft/s.
  • Power Requirements: 12 to 25 VDC @ 250 mA; (12 to 25 VDC @ 40 mA (max 250 mA) - LOP option).
  • Electrical Connection: Terminal block.
  • Conductivity: 20 microSiemens/cm.
  • Enclosure Material: Die-cast powder-coated aluminum.
  • Enclosure Rating: NEMA 4X (IP66).
  • Weight: 3 lb (1361 g).
SERIES EFS2 Insertion Electromagnetic Flow Sensor
SIZE 1 1 to 3 inch pipe
  2 4 to 10 inch pipe
  3 12 in pipe
  S 316SS
OPTIONS FOR Fluoroelastomer o-ring
  IMM Immersible
  LOP Low power
  RFO Reverse flow output