The Series EFS2 InsertionElectromagnetic Flow Sensor is designed for pipe sizes
from 1 to 12˝ and comes inthree different materials (stainless steel, brass and PVC). There are a varietyof custom fittings to choose from to ensure accurate fitting in the pipe. TheSeries EFS2 is useful for any applications where moving parts would be aproblem, such as dirty liquids. It can handle applications where there are rapidchanges in viscosity and flow. Other applications include small pipes andchemical metering pumps.
| Example | EFS2 | 1P | RFO | EFS2-1P-RFO |
| Series | EFS2 | Insertion Electromagnetic FlowSensor | ||
| Size/Material | 1P | 1 to 3˝ Pipe, PVC | ||
| 1B | 1 to 3˝ Pipe, Brass | |||
| 1S | 1 to 3˝ Pipe, 316 SS | |||
| 2P | 4 to 10˝ Pipe, PVC | |||
| 2B | 4 to 10˝ Pipe, Brass | |||
| 2S | 4 to 10˝ Pipe, 316 SS | |||
| 3P | 12˝ Pipe, PVC | |||
| 3B | 12˝ Pipe, Brass | |||
| 3S | 12˝ Pipe, 316 SS | |||
| Options | RFO | Reverse Flow Output | ||
| IMM | Immersible (Urethane PottedElectrical Connection) | |||
| FOR | Fluoroelastomer O-ring | |||
| LOP | Low Power (12 to 25 VDC @ 40 mA)(max 250 mA) |
PRINCIPLE OF OPERATION
The EFS2 is a liquid flow meterthat uses the conductivity of fluids to measure flow rate. Liquid flow throughits magnetic field produces a voltage that is measured and translated into anoutput signal. It has a pulse frequency output which can be used with the SeriesRTI to indicate flow rate and total, as well as the Series BAT signal converterwhich provides an analog signal.
APPLICATIONS
Industrial Process
Chemical Metering Pumps
Fertigation
ACCESSORIES
Series BAT, Blind AnalogTransmitter, converts pulse output to 4 to 20 mA analog output. Unit is looppowered, fits on the enclosure of the meter, and is fields spannable.
Series RTI, Rate TotalIndicator, converts pulse output to 4 to 20 mA analog output with local flowrate and totalization display. Unit is loop powered, fits on the enclosure ofthe meter, and provides a high/low flow alarm.
Series PWD, Pulse Divider,for use with pacing electronic metering pumps. Unit divides the input frequencyto any number from 1 to 9999 with the use of rotary switches to suit a number ofmetering pump inputs.
SPECIFICATIONS
Service: Compatible clean ordirty non-coating, conductive liquids.
Range: 0.28 to 20 ft/s (0.08 to6.09 m/s).
Wetted Materials:
Sensor: 316 SS, brass or PVC;Electrodes: Hastelloy®, metal; Electrode Cap: PVDF;
O-ring: EPDM (fluoroelastomeroptional).
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 to72°C).
Pressure Limits:
Brass/SS: 200 psi (13.8 bar);PVC: 150 psi (10 bar).
Process Connection: See SeriesEFF.
Output: Current sinking, squarewave 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: Terminalblock.
Conductivity: 20 microSiemens/cm.
Enclosure Material: Housing:Die-cast powder-coated aluminum.
Enclosure Rating: NEMA 4X (IP66).
Weight: 3 lb (1361 g).
