Low Flow Electromagnetic Flow Meter

The FMG70B Series from OMEGA is a trio of extremely compact, low cost, inductive magnetic flow sensors. This product line allows a unique and highly reliable measuring technique to be introduced into areas of process control previously considered not possible.

Changes of temperature, density, viscosity, concentration or electrical conductivity (minimum conductivity of 50 µs/cm) of the fluid do not affect the output signal.

FMG70B series can be used in areas where flow sensors with moving parts e. g. paddle wheel sensors, cannot be applied due to contamination/particulate in the media. The sensor is intended for continuously measuring of flow rates or for dosing/batching of electrically conductive liquids (minimum conductivity 50 S/cm). The output signal frequency (or current) is proportional to the flow. Two options are available for output signals, frequency or analog.

SPECIFICATIONS:

Materials of Construction
Electrodes and Process Connection: Stainless steel 316 TI
Measuring Pipe: PEEK-GF30
Gasket: EPDM
Housing: Cast Aluminum
Accuracy: ±1.5% of reading ±0.3% range
Repeatability: 1%
Minimum Conductivity: 50 µs/cm
Maximum Liquid Temperature: 90°C (194°F)
Ambient Temperature: 5 to 70°C (41 to 158°F)
Maximum Pressure: 16 bar (232 psi)
Flow Indication: LED green, flow proportional blinking
Frequency: Square wave signal NPN, internal pull-up resistor 2 kOhm pulse duty ratio 50:50
Signal Current Maximum: 20 mA, current limited
Response Time: <500 mS
Electrical Connection: Plug connector M12 x 1
Power Supply: 24 Vdc ±10%
Current Consumption: Maximum 150 mA
Electrical Protection: Measures short-circuit proof (up to 30V) and polarity protection (up to -30V)
Protection Class: NEMA 4X (IP65)
Flow Range:
    FMG71B: 0.5 to 30 LPM (0.13 to 7.93 GPM)
    FMG72B: 1 to 60 LPM (0.26 to 15.85 GPM)
    FMG73B: 5 to 250 LPM (1.32 to 66 GPM)
Analog Output Signal (“-A” Models) 4 to 20 mA (0 to Full Scale):
    Current Limitation: 26 mA approx.
    Maximum Load: 250 Ohm to GND

Complete informations can be found in the spec sheet (PDF), see the "Download" section.