Dwyer Instruments SERIES EFS2 Catalog Page
The Series EFS2 Insertion Electromagnetic Flow Sensor is designed for pipe sizes
4-15/16 [125.30]
4
[101.42]
3/32˝ THICK
GASKET
2-3/4
[69.90]
ELECTRODES
O-RING
Ø1-37/64
[40.13]
SENSOR BODY
[STAINLESS STEEL, BRASS OR PVC]
3-9/32
[83.45]
MODEL: EFS2-XX-XXX
SN: XXXXXXXXXX
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 EFS2 is a liquid flow meter that uses the conductivity of fluids to measure flow
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.
APPLICATIONS
• Industrial process
• Chemical metering pumps
• Fertigation
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 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
Fixed Insertion
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.
Flow Transmitters, Electromagnetic,
Example
Series
Size/
Material
Options
Note: Need to purchase with Series EFF fittings for proper installation.
Stocked
Model
EFS2-1P
EFS2-1B
EFS2-1S
EFS2-2B
EFS2-3B
Series
EFS2
Scan here
to watch
product video
1P
EFS2
EFS2
Description
Insertion Electromagnetic Flow Sensor
Insertion Electromagnetic Flow Sensor
Insertion Electromagnetic Flow Sensor
Insertion Electromagnetic Flow Sensor
Insertion Electromagnetic Flow Sensor
RFO
1P
1B
1S
2P
2B
2S
3P
3B
3S
RFO
IMM
FOR
LOP
EFS2-1P-RFO
Insertion Electromagnetic Flow Sensor
1 to 3˝ Pipe, PVC
1 to 3˝ Pipe, Brass
1 to 3˝ Pipe, 316 SS
4 to 10˝ Pipe, PVC
4 to 10˝ Pipe, Brass
4 to 10˝ Pipe, 316 SS
12˝ Pipe, PVC
12˝ Pipe, Brass
12˝ Pipe, 316 SS
Reverse Flow Output
Immersible (*Urethane Potted Electrical Connection)
Fluoroelastomer O-ring
Low Power (12 to 25 VDC @ 40 mA) (max 250 mA)
Insertion Electromagnetic Flow Sensor
No Moving Parts, Durable, Easy Installation & Maintenance
SPECIFICATIONS
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:
Pipe
Size
1 to 3˝
1 to 3˝
1 to 3˝
4 to 10˝
12˝
Sensor: 316 SS, brass or PVC;
Electrodes: Hastelloy
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 page reference u below.
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: Housing: Die-cast powder-coated aluminum.
Enclosure Rating: NEMA 4X (IP66).
Weight: 3 lb (1361 g).
Material
PVC
Brass
SS
Brass
Brass
®
, metal;
®
Hastelloy
is a registered trademark of Hanes International
uProcess Connection: See page 213 (Series EFF)
212
DWYER INSTRUMENTS, INC. | www.
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