Omega Products FMG-554 User Manual
INSERTION METAL MAGMETER
25.4 (1.0)
41 (1.6)
289 (11.38)
257 (10.1)
238 (9.38)
1¼ NPT
threads
131 (5.14)
3 (1.5)
(3.)
FMG-550 Series
Close-up
view of
electrodes,
shown
U Hot-Tap Version for
Installation and Service
Without System
Shutdown
U Diagnostic Features Using
Colored LED Lights
1
⁄4 NPT Threads
U 1
U Optional Detachable
Waterproof Cable
U Output Choices of
Frequency or 4 to 20 mA
U Bi-Directional Flow and
Empty Pipe Detection
U No Moving Sensor Parts
U Adjustable Insertion for
Pipe Sizes 50 mm (2")
up to 1200 mm (48")
U Flow Rate Range 0.05 to
10 m/s (0.15 to 33 ft/s)
U Measurement in Dirty
and High-Solid
Content Liquids
actual size.
Dimensions: mm (in)
The FMG-550 Series magmeter flow
sensors are heavy-duty, high-
performance sensors in an
adjustable, insertion configuration
that can be used with a ball valve
for hot-tap installations. This
insertion-style flow sensor has
no moving parts and is constructed
of corrosion-resistant materials to
provide long-term reliability with
minimal maintenance costs. The
FMG-550 Series is versatile and
simple-to-install, delivering reliable
flow measurement over a wide
dynamic range. Pipe sizes range
from 2 to 48". Omega’s FMG-550
magmeters offer frequency or
current outputs. The blind transmitter
(4 to 20 mA output) is available for
FMG-553, shown
smaller than actual size.
long distance signal transmission.
The empty pipe detection features
a zero flow output when the
electrodes are not completely
wetted. The frequency output is
bi-directional while the 4 to 20 mA
output can be set for uni- or
bi-directional flow. The 4 to 20 mA
H-13
output is factory spanned. Other
configurations available, contact
Omega’s Flow department for details.
SPECIFICATIONS
Wetted Materials: 316 L stainless steel
body and electrodes, PVDF insulator,
O-rings (FPM standard), 4-conductor
shielded cable, PVC jacket (fixed cable
models) or watertight rubber cable
with connector on “-SUB” models
Power: 4 to 20 mA (24 Vdc nominal,
21.6 to 26.4 Vdc max, 22.1 mA
maximum), frequency (5 to 24 Vdc
nominal, 5 to 26.4 Vdc max, 15 mA
max), reverse polarity and short circuit
protected pipe size of DN50 to DN1200
(2 to 48")
Flow Range: 0.05 m/s (0.15 ft/s) min,
10 m/s (33 ft/s) max
Linearity: ±1% reading + 0.01 m/s
(±1% reading + 0.033 ft/s)
Repeatability: ±0.5% of rdg @ 25°C
Minimum Conductivity: 20 µS/cm
Accuracy: <±2% of measured value
in reference conditions where the fluid
is water at ambient temperature, the
appropriate upstream and downstream
distances are observed, the sensor is
inserted at the correct depth, and there
is a fully developed flow profile which
is in compliance to ISO 7145-1982
(BS 1042 section 2.2).
Electrical Current Output: 4 to 20 mA,
programmable and reversible, loop
Accuracy: 32 µA max error
(at 25°C @ 24 Vdc)
Temperature Drift: ±1 µA per °C max
Power Supply Rejection: ±1 µA per V
Isolation: Low voltage < 48 Vac/dc from
electrodes and auxiliary power
Maximum Cable: 300 m (1000')
Maximum Loop Resistance: 300 Ω
Error Condition: 22.1 mA
frequency output
Maximum Pull-up Voltage: 30 Vdc
Short-Circuit Protected: <30 V @
0 Ω pull-up for 1 hour, reverse polarity
protected to -40 V for 1 hour,
over-voltage protected to 40 V for 1 hour
Maximum Current Sink: 50 mA,
current limited
Temperature/Pressure Ratings
Storage Temperature: -15 to 70°C
(5 to 158°F) in non-icing conditions
Operating Temperature Ambient:
-15 to 70°C (5 to 158°F) in
non-icing conditions
Media: -15 to 85°C (5 to 185°F)
Maximum Operating Pressure:
20.7 bar @ 25°C (300 psi @ 77°F)
Hot-Tap Installation Requirements:
Maximum Installation Pressure:
20.7 bar (300 psi)
Maximum Installation Temperature:
40°C (104°F) Hot-tap installation
at temperatures that are greater
than 40°C (104°F) or with
hazardous liquids are not
permitted with this product.
Connector: NEMA 6P (IP68)
EN 61326: Immunity and emissions
for control equipment
FMG-553, shown
smaller than
actual size.
Each FMG-550
magmeter includes
alignment rod,
hex wrench, ruler
and clamp rings
in a convenient
carrying case.
A large selection of iSeries process meters and controllers are
available. Visit omega.com/cni_series for the selection guide.
To Order Visit omega.com/fmg-550 for Pricing and Details
Model No. Description
FMG-553 Magmeter 9.4" hot tap, frequency output
FMG-554 Magmeter 9.4" hot tap, 4 to 20 mA output
FMG-550-S-CABLE 4 conductor, 22 AWG, water tight connector, 6 m (19.5')
Comes complete with operator’s manual, alignment rod, hex wrench, clamp rings and ruler.
For models with water-tight sensor connector for temporary submersion add “-SUB” to the
model number, no additional charge.
Ordering Examples: FMG-554, insertion magmeter 7.3" protrusion, 4 to 20 mA output.
FMG-553, insertion magmeter, frequency output with FMG-550-S-CABLE, 6 m (19.5') cable
with water tight connector.
H-14
H
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