Page 1
ElEctromagnEtic
low FlowmEtEr
FMG70 Series
U No Moving Parts
U No Flow Obstructions
U Maintenance-Free
U Fast Response Time
(< 500 ms)
U Minimal Straight Pipe
Requirements
The FMG70 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.
FMG70 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 (-A Models).
SPECIFICATIONS
Materials of Construction
Electrodes and Process Connection:
Stainless steel 316 TI
Measuring Pipe: PEEK-GF30
Gasket: EPDM
Housing: Cast Aluminum
Accuracy: ±2% of reading
Repeatability: 2%
Minimum Conductivity: 50 µs/cm
FMG71 shown with
DPF701
meter/totalizer. Visit
omega.com/dpf701 to order.
1
DIN 6-digit rate
⁄
8
FMG71 shown actual size.
Maximum Liquid Temperature:
90ºC (194°F)
Ambient Temperature: 5 to 70ºC
(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 kΩ 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 80 mA
Electrical Protection: Measures
short-circuit proof (up to 30V) and
polarity protection (up to -30V)
Protection Class: NEMA 4X (IP65)
Flow Range:
FMG71: 0.95 to 18.9 LPM
(0.25 to 5.0 GPM)
FMG72: 1.89 to 37.9 LPM
(0.5 to 10.0 GPM)
FMG73: 9.46 to 189.3 LPM
(2.5 to 50.0 GPM)
Analog Output Signal (“-A” Models)
4 to 20 mA (0 to Full Scale):
Current Limitation: 26 mA approx.
Maximum Load: 250 Ω to GND
H
H-XX
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12
(0.47)
M12x1
129 (5.06)
~ 81 (3.2)
~ 56 (2.2)
31 (1.22)
14 (0.55)
Light emitting diode
plug M12x1
142 (5.59)
~ 56 (2.2)
31 (1.22)
6.0
5.0
4.0
3.0
2.0
1.0
0.0
Pressure drop ∆p (psi)
0 2 4 6 8 10 12
Flow rate (US gal/min)
FMG72
FMG71
Ø 20 (0.79)
~ 76 (3.0)
35
(1.36)
½ NPT/BSP
26
(1.02)
~ 76 (3)
32
(1.26)
Ø 6.9 (0.27)
Ø 9.9 (0.39)
Dimensions, Pressure drop Series FMG
10. Dimensions, Pressure drop
FMG71
FMG72
12
(0.47)
M12x1
129 (5.06)
~ 81 (3.2)
~ 56 (2.2)
31 (1.22)
14 (0.55)
Light emitting diode
plug M12x1
nut size 27 (1.063)
6.0
5.0
4.0
3.0
2.0
1.0
0.0
Pressure drop ∆p (psi)
0 2 4 6 8 10 12
Flow rate (US gal/min)
FMG72
FMG71
½ NPT/BSP
26
(1.02)
~ 76 (3)
32
(1.26)
Ø 6.9 (0.27)
Ø 9.9 (0.39)
Ø 6.9 (0.27)
~ 56 (2.2)
31 (1.22)
~ 76 (3)
32
(1.26)
Ø 6.9 (0.27)
Ø 9.9 (0.39)
Dimensions, Pressure drop Series FMG
10. Dimensions, Pressure drop
12
M12x1
129 (5.06)
~ 81 (3.2)
~ 56 (2.2)
31 (1.22)
~ 56 (2.2)
31 (1.22)
~ 56 (2.2)
31 (1.22)
6.0
5.0
4.0
3.0
2.0
1.0
0.0
Pressure drop ∆p (psi)
0 2 4 6 8 10 12
Flow rate (US gal/min)
FMG72
FMG71
Ø 20 (0.79)
~ 76 (3.0)
35
(1.36)
~ 76 (3)
32
(1.26)
Ø 6.9 (0.27)
Ø 9.9 (0.39)
Dimensions, Pressure drop Series FMG
10. Dimensions, Pressure drop
FMG71
FMG72
12
(0.47)
M12x1
129 (5.06)
~ 81 (3.2)
~ 56 (2.2)
31 (1.22)
14 (0.55)
Light emitting diode
plug M12x1
nut size 27 (1.063)
FMG73
12 (0.47)
142 (5.59)
~ 81 (3.2)
M12x1
~ 56 (2.2)
31 (1.22)
6.0
5.0
4.0
3.0
2.0
1.0
0.0
Pressure drop ∆p (psi)
0 2 4 6 8 10 12
Flow rate (US gal/min)
Flow rate (US gal/min)
0 10 20 30 40 50 60
Pressure drop ∆p (psi)
2.0
1.5
1.0
0.5
0.0
FMG72
FMG71
FMG73
®
Ø 20 (0.79)
~ 76 (3.0)
35
(1.36)
½ NPT/BSP
26
(1.02)
~ 76 (3)
32
(1.26)
Ø 6.9 (0.27)
Ø 9.9 (0.39)
Dimensions, Pressure drop Series FMG
10. Dimensions, Pressure drop
FMG71
FMG72
12
(0.47)
M12x1
129 (5.06)
~ 81 (3.2)
~ 56 (2.2)
31 (1.22)
14 (0.55)
Light emitting diode
plug M12x1
nut size 27 (1.063)
6.0
5.0
4.0
3.0
2.0
1.0
0.0
Pressure drop ∆p (psi)
0 2 4 6 8 10 12
Flow rate (US gal/min)
FMG72
FMG71
½ NPT/BSP
26
(1.02)
~ 76 (3)
32
(1.26)
Ø 6.9 (0.27)
Ø 9.9 (0.39)
~ 56 (2.2)
31 (1.22)
6.0
5.0
4.0
3.0
2.0
1.0
0.0
Pressure drop ∆p (psi)
0 2 4 6 8 10 12
Flow rate (US gal/min)
FMG72
FMG71
~ 76 (3)
32
(1.26)
Ø 6.9 (0.27)
Ø 9.9 (0.39)
FMG71
FMG72
Dimensions: mm (inch)
Ø = diameter
6.0
5.0
4.0
3.0
2.0
1.0
Pressure drop ∆p (psi)
0.0
Ø 9.9 (0.39)
~ 76 (3)
32
(1.26)
0 2 4 6 8 10 12
~ 56 (2.2)
31 (1.22)
FMG71
Flow rate (US gal/min)
FMG72
FMG73
1 NPT/BSP
Nut size 34 (1.338)
12 (0.47)
25
(0.98)
plug M12x1
Light emitting diode
~ 81 (3.2)
M12x1
~ 56 (2.2)
31 (1.22)
To Order Visit omega.com/fmg70 for Pricing and Details
Model No. Model No. Output NPT/BSP Sensor I.D.
FMG71 FMG71-BSP Npn frequency, ¹⁄₂ ¹⁄₄"
3237 pulses/gal
FMG72 FMG72-BSP Npn frequency, ¹⁄₂ ³⁄₈"
3237 pulses/gal
®
FMG73 FMG73-BSP Npn frequency, 1 ³⁄₄"
757 pulses/gal
FMG71-A FMG71-A-BSP 4 to 20 mA, ¹⁄₂ ¹⁄₄"
0 to 5 GPM
FMG72-A FMG72-A-BSP 4 to 20 mA, ¹⁄₂ ³⁄₈"
0 to 10 GPM
FMG73-A FMG73-A-BSP 4 to 20 mA, 1 ³⁄₄"
0 to 50 GPM
Comes complete with operator’s manual.
Ordering Examples: FMG72 flow senor with frequency output, DPF701 digital panel meter,
and M12C-PVC-4-R-F-5, 5 m (16.4') cable. Visit omega.com/dpf701 to order panel meter.
29
(1.15)
2.0
1.5
1.0
0.5
Pressure drop ∆p (psi)
0.0
0 10 20 30 40 50 60
Flow rate (US gal/min)
FMG71-A flow sensor with analog output, DPF64 digital rate meter, and M12C-PVC-4-R-F-5,
~ 76 (3.0)
35
(1.36)
Ø 20 (0.79)
5 m (16.4') meter cable. Visit omega.com/dpf64 to order rate meter.
Accessories
Model No. Description
M12C-PVC-4-R-F-5 5 m (16.4') cable with right angle M12 x stripped leads
M12C-PVC-4-R-F-10 10 m (32.8') cable with right angle M12 x stripped leads
PSU-93 Unregulated power supply
H-XX
FMG73
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