The FWD ultrasonic air flow meter measures flow rate of air or nitrogen gas
As an air flow sensor, it is ideal for the management of the operating load rate of compressors, the supervision of the compressed air consumption in factories and detection of air leakage in plants.
This mass flow meter for compressed air marks a real technological breakthrough in air flow measurement. It allows to highlight your compressed air consumption. Its objective is to make important energy savings by identifying the consuming networks and the compressed air leaks. With a flawless accuracy, this mass flow meter allows you to control and adjust the parameters of your air compressor.
Efficient use of energy helps control costs and reduce the negative impact on the environment.
In a factory, among the utilities, compressed air represents up to 20% of the total energy budget of a factory.
The need for this gas is one of the largest electrical consumption items, but the price of this energy can be controlled.
Flow meters are used in compressed air systems to provide a measure of flow rate through air velocity.
Compressed air systems typically have high leakage rates, high start-up and shutdown times, and other problems that lead to losses and therefore waste.
Industrial air flow meter can identify areas of excessive use and better manage the overall flow of the compressed air system.
Measuring, analyzing and communicating key plant performance indicators can then help educate personnel on efficient practices, thereby controlling costs, ensuring better equipment protection and saving money.
Fuji Electric's compressed air flow meters consist of two ultrasonic sensors installed on each side of the meter inlet and outlet. As the liquid flows, the ultrasonic waves propagate diagonally from the upstream sensor to the downstream sensor and back in the pipe where the mass flow meter is positioned.
With this technique, the waves are "carried" by the fluid, in the other, they are "braked". It therefore takes a different time to pass from one sensor to the other. This difference is proportional to the velocity and therefore to the flow rate of the fluid. This time difference allows to detect the fluid flow velocity and to calculate the volumetric flow rate according to the cross section of the flow meter and the flow velocity measurement. The number of measuring points of compressed air flow meters must be adapted to the size and use of the system. In contrast to thermal mass flow meters or vortex flow meters technologies, the FWD ultrasonic flow sensors technology does not clog and is highly resistant to oil-contaminated compressed air. It works even in the presence of water droplets (high dew point).
The combined measurement of flow rate, velocity, temperature and pressure provides clear data on compressed air consumption and eliminates any uncertainty in the measurement.
These air flow sensors are resistant to industrial environments and vibrations.
These air flow devices are ideal for companies operating in an industrial environment.
We are very pleased with the performance of this ultrasonic flow meter. It is easy to install and use, and it delivers measurement quickly, allowing us to identify the compressed air leakage and reduce our compressed air consumption.
|Pipe diameter (mm)||DN25, DN32, DN40, DN50, DN65, DN80, DN100, DN150, DN200|
|Power supply||24 V DC ±10% or Built-in battery type (battery life : approx.10 years at 20˚C)|
|Power consumption||24 V DC, 1.5 W or less|
|Applicable fluids||Air (mainly air factory) or Nitrogen (25-80 mm diameter)|
|Temperature and humidity of fluid||10°C to 60°C, RH 90% or less|
|Working pressure||0 to 1 MPa (gauge pressure)|
|Range (actual flow rate) and accuracy||Diameter||Flow rate range (m3/h)||Accuracy|
|±2.0% of flow rate||±5.0% of flow rate|
|DN25||±0.6–35||±3.5–35 m3/h||±0.6–3.5 m3/h|
|DN32||±1.1–65||±6.5–65 m3/h||±1.1–6.5 m3/h|
|DN40||±1.3–80||±8–80 m3/h||±1.3–8 m3/h|
|DN65||±4–240||±24–240 m3/h||±4–24 m3/h|
|DN80||±5–300||±30–300 m3/h||±5–30 m3/h|
|DN100||±10–500||±50–500 m3/h||±10–50 m3/h|
|DN150||±24–1200||±120–1200 m3/h||±24–120 m3/h|
|DN200||±40–2000||±200–2000 m3/h||±40–200 m3/h|
|Air flow rate conversion accuracy||FWD 025–080 : ±2.5% or rate (at 500 kPa, 25°C, dry air)|
FWD 100–200 : ±2.0% or rate (at ≥ 300 kPa)
Forward or forward/reverse mode :
(not available for battery-driven version)
|Current ouput||4–20 mA DC (±0.5% FS), maximum resistance load 400Ω, maximum output current 22 mA|
Instantaneous flow rate, velocity, pressure, or temperature measurement
|Process connection type||Ø25, Ø32 mm||Screwed type Ø25 mm : Rc1, Ø32 mm : Rc1-1/4|
|Ø40–Ø80 mm||Wafer type (between JIS10K flanges)|
|Ø100–Ø200 mm||Flange type JIS10K standard|
|Materials of wetted parts||Aluminum alloy, PPS, fluorosilicone rubber, etc.|
|Installation location||Indoor or outdoor (IP64 equivalent)|
|Storage temperature||-20°C to 70°C, non condensing|