Ultrasonic flow meter for air battery powered - FWD - A

The FWD ultrasonic air flow meter measures flow rate of air

Fields of application

Flowmeters withstand industrial environments and vibrations.
These flowmeters for compressed air are ideal for companies operating in industrial environments: pharmaceuticals, glassmaking, automotive, chemicals, metallurgy, food and beverage.


  • Quick, easy and cost-effective installation
  • Clear view of your compressed air consumption
  • Early detection of air leaks
  • Reliability and accuracy of measurements
  • Maximum flexibility and wide range applications
  • Low maintenance costs
  • Designed to last in harsh industrial environments
  • A wide range of pipe diameters
  • Easily adapts to all industrial airflow conversion formulas
  • Allows bidirectional measurement of compressed air flow
Reference: FWD-A - BATTERY
From 2298 €
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The FWD is an ultrasonic flow meter that measures air flow in pipes from 25 mm to 200 mm. This air flow meter is ideal for managing compressor operating load, controlling the amount of air used in the plant, and detecting any air leaks in the plant.

Pipe diameter (mm) DN25, DN32, DN40, DN50, DN65, DN80, DN100, DN150, DN200
Supply voltage24 V DC ±10% or built-in battery type (battery life : approx.10 years at 20˚C)
Power consumption24 V DC, 1.5 W or less
Applicable fluidsAir (mainly factory air)
Fluid temperature10°C to 60°C, RH 90% or less
Working pressure< 1 MPa (pression relative)
Scale (instantaneous flow) and precisionDiameterFlow rate range (m 3/h)Accuracy
±2.0% of flow rate±5.0% of flow rate
Air flow rate conversion accuracyFWD025-080: ±2.5% of measurement (at 500 kPa, 25°C, dry air)
FWD100-200: ±2.0% of measurement (at ≥ 300 kPa)
Display1st lineTotalized value (m3) 8-digit, Instantaneous flow (l/mm) 8-digit
2nd lineInstantaneous flow (Nm3/h) 5-digit (4-digit after 2000), Pressure (kPa) 5-digit, Temperature (°C) 3-digit
(not available with battery supply)
Current output4-20 mA DCC (±0.5% PE), max. load resistance. 400Ω, max. current output 22 mA
Instantaneous flow, pressure or temperature
Contact output2 contact outputs, max. load 24 V DC, 50 mA, max. frequency: 10 Hz,Output 1: pulses (forward), Output 2: pulses (reverse), high/low alarm, system error
Process connection type⌀25, ⌀32 mm⌀25 mm: Rc1, ⌀32 mm: Rc1-1/4
⌀40-⌀80 mmFlange mounting (JIS10K)
⌀100-⌀200 mmFlange mounting JIS10K
Mounting conditions
(straight lengths)
⌀25, ⌀32 mm20D or more upstream, 5D or more downstream
When used for bidirectional measurement, 20D or more downstream and upstream
⌀40-⌀200 mm10D or more upstream, 5D or more downstream
When used for bidirectional measurement, 10D or more downstream and upstream
Materials of wetted partsAluminum alloy, PPS, fluorosilicone rubber, etc.
Installation locationIndoor or outdoor (IP64 equivalent)
Storage temperature-20°C to 70°C, non-condensing


datasheet In-line ultrasonic flowmeter for air and nitrogen gas FWD

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Brochure: Ultrasonic flowmeters for liquids, steam and air

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Application: Improving compressed air efficiency using no-pressure-loss ultrasonic flow measurement

Application Sheet Download

Flyer: Detect and stop air leaks with the FWD ultrasonic flow meter

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Brochure: Measures for energy and the environment

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Ultrasonic flow meter for air battery powered - FWD - A

From 2298 €

Reference : FWD-A - BATTERY