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Differential pressure Flow
Meter - no straight length required
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Flare Gas Ultrasonic Flow Meter
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Portable Ultrasonic Flow Meter
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Flare Gas Meter
Field computer & ultrasonic transducers
The Fluenta FGM 160 has been developed to measure
flare gas in pipes where pressure, a wide range of
velocity and large pipe diameters represent a challenge.
Fluenta offers world-class flare gas meters
characterized by:
- Optimized signal processing and acoustic sensors
enabling flow measurement up to 100 m/s
- Automatic Gain Control (AGC) for enhanced
performance
- Digital Signal Processing (DSP)
- Software based user interface (Operator Console)
- Easy and fast to install
- Field mounted flow computer
- Low maintenance costs
- Serial interface based on Modbus protocol
Advantages
- Widest velocity range on the market
- Wetted non intrusive sensor design for all pipe
sizes
- High measurement accuracy throughout entire
range
- Unique signal processing ensures high accuracy
at low flow rate
- Fast response time
- Certified for operation in hazardous areas
- No calibration required after installation
- Rapid installation gives reduced costs
- Low maintenance
- High reliability
Application
- Measurement of flare and vent gas,
characterized by a large velocity range, low
pressure and large pipe diameters
- Flare gas density calculation for gas
composition indications
- Leak detection and loss calculation for mass
balance in process plants
- Accurate measurement of very low flow rates in
flare and vent systems.
Installation
Fluenta’s FGM 160 has specially designed jigs for
fast, economical and accurate mounting of transducer
holders. These holders are welded onto the pipeline at
an angle suitable for each different pipe size. The
meter can either be delivered as a hot/cold tap version
or with a prefabricated spool piece.
Operating principle
The Fluenta FGM 160 measures gas velocity based on
the time–of–flight technique. The ultrasonic transducers
are mounted at an angle to the pipe. Both transducers
transmit and receive pulses and the transit time is
measured. When the gas is flowing in the pipe, the
pulses travelling against the flow take longer to reach
the opposite transducer than the pulse travelling with
the flow. This time difference is used to calculate the
velocity of the flowing medium.
Specifications
Field Computer
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Power input: |
+24 VDC (18 – 36 VDC or 110 – 240 VAC 50/60
Hz, safe area power supply optional) |
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Consumption: |
12 W maximum |
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Power / instrument cable : |
Standard twisted pair: RFOU(i)2-3 x 2 x
0.75mm2 |
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Dimensions: |
460 x 280 x 250mm (H x W x D) |
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Weight: |
17 kg |
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Input signals: |
Signal from transducers via std instrument
cable |
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Temperature & Pressure: |
4-20 mA or HART interface |
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Output: |
3 x 4-20 mA analog output channels, with
selectable parameters. RS 422/485 Serial
Port based on Modbus protocol |
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Optional output: |
Additional 3 x 4-20 mA channels
HART
Pulse/frequency signal |
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Electrical classification: |
Explosion proof
Ex de (ia) II C T5-T6
Ex d optional
Integrated Barriers |
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Ingressive Protection: |
IP 66 |
Ultrasonic Transducers
The Fluenta FGM 160 ultrasonic transducers are wetted
but non-intrusive. The advantage of this is that the
intrusive sensors are more exposed to deposits and
particles in the flow. In addition, high flow velocity
may cause vibration of the sensors. Such vibration can,
over a period of time, lead to a reduced performance of
the sensors.
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Material: |
SS316/Titanium |
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Safety class: |
Ex ia II C T6 intrinsically safe (Zone 0) |
System performance and characteristics
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Pipe size: |
6” and larger (smaller pipe sizes available
on request) |
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Velocity range: |
0,03 – 100 m/s (0.1 – 328 ft/s) |
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Uncertainty at 95% confidence level (fully
developed flow): |
±2,5 – 5% of measured value for Qv |
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Resolution: |
0.0008 m/s |
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Repeatability: |
Better than 1% |
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Turndown rangeability: |
3330 : 1 |
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Operation temperature: |
-110 °C - +150 °C (transducers)
-40 °C - +85 °C (electronics)
-50 °C - +60 °C ambient temp |
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Operating pressure: |
0.8 – 10 Bar a |
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Design temperature: |
-150 °C - +315 °C (transducers) |
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Design pressure: |
20 Bar a (transducers) |
Operator Console
- Trend curves of all relevant measured and
calculated values
- Full access to all parameters
- Log of historical measurements
- Reconfiguration and SW upload to field computer
- Integrated service console
- TCP/IP interface option for remote diagnostics
and control.
For installation on
- control room computer
- service computer
- remote computers
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All Rights Reserved.
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