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Intelligent Swirl (Precession Vortex) Flow Meter (gas, T/P compensated, ±1.0 %)
Precession vortex gas flow meter with built-in temperature and pressure compensation, DN15 to DN100, accuracy ±1.5 % (±1.0 % high-precision type), turndown up to 1:20, battery or 24 V DC, 4 to 20 mA, pulse, RS485, GPRS / NB-IoT.
Certified equipment
ATEX / IECEx documentation supplied where stated
Worldwide delivery
Incoterms agreed in each quotation
Quotation first
Price, lead time and certificates in every offer
The intelligent swirl flow meter is a gas flow meter based on the precession vortex principle. Helical guide vanes set the gas into rotation; the resulting vortex core precesses in a venturi section at a frequency proportional to the volume flow rate, which is detected by piezoelectric sensors.
An integrated microprocessor with built-in pressure and temperature sensors converts the measurement to standard volume flow, so no external transmitters or flow computer are needed. Sensor, display and compensation unit form a compact assembly with a single mounting interface.
Key features
- Built-in pressure and PT1000 temperature sensors, direct standard volume flow output (Nm³/h)
- Turndown 1:15 (standard) or 1:20 (high-precision type) with low start-up flow
- Accuracy ±1.5 % (standard) or ±1.0 % (high-precision); repeatability better than ±0.3 %
- Self-diagnostics: battery status, sensor condition, out-of-limit alarms
- IC card control, data encryption and valve control functions
- 4 to 20 mA, pulse, RS485 (Modbus) and GPRS / NB-IoT wireless transmission
- Lithium battery operation (life of 5 years or more) or external 24 V DC
Technical data
| Model | Intelligent swirl (precession vortex) flow meter |
| Measuring principle | Precession vortex (swirl) with piezoelectric detection |
| Medium | Gases |
| Nominal diameter | DN15, DN25, DN40, DN50, DN80, DN100 |
| Accuracy | ±1.5 % (standard type); ±1.0 % (high-precision type) |
| Repeatability | Better than ±0.3 % |
| Turndown | 1:15 (standard); 1:20 (high-precision type) |
| Working pressure | PN 1.6 MPa, PN 2.5 MPa; higher (e.g. 4.0 MPa) on request |
| Compensation | Built-in pressure sensor and PT1000 temperature sensor |
| Output | 4 to 20 mA, pulse, RS485 (Modbus), GPRS / NB-IoT |
| Power supply | 3.6 V lithium battery (5 years or more) or external 24 V DC |
| Protection | IP65 |
Applications
- City gas metering for commercial users and small industrial consumers
- Compressed air, nitrogen, oxygen, biogas and coal gas metering at small to medium flow rates
- Gas consumption monitoring of boilers and kilns for energy management
- CNG pressure regulation skids and LNG after vaporisation
- Biogas, landfill gas and flare gas recovery metering
Hazardous areas
Standard version for safe areas. Ask us for hazardous-area options.
Supplied on quotation and configured to your process data (range, process connection, materials, output, options). Datasheet available on request.
Supplied from a qualified manufacturer selected by ASSINOV. Origin, manufacturer details and certificates are provided with our quotation.
AG-FLW-113
Data sheet
- Accuracy
- ±1.0 % or ±1.5 %
- Output
- 4 to 20 mA / pulse / RS485 / GPRS or NB-IoT
- Process connection
- DN15 to DN100
- Protection
- IP65
- Measuring principle
- Precession vortex (swirl)
- Max. pressure
- 2.5 MPa standard (4.0 MPa on request)
13 other products in the same category:
Precession vortex gas flow meter with built-in temperature and pressure compensation, DN15 to DN100, accuracy ±1.5 % (±1.0 % high-precision type), turndown up to 1:20, battery or 24 V DC, 4 to 20 mA, pulse, RS485, GPRS / NB-IoT.