Dwyer Series IEFS
Insertion 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.
PRINCIPLE OF OPERATION
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.
APPLICATIONS
• Conductive Liquids
• Municipal
• Industrial
• Irrigation
ACCESSORIES
• 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).
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