The AFMB Average Flow Measurement Blade provides an easy and low-cost solution for measuring air velocity and volume in both square and circular ducts. Installed within the duct, it stably and accurately measures the total, static, and velocity pressure, utilizing the principle that the square root of the velocity pressure is proportional to air velocity.
This device is well-suited for various air conditioning systems, vacuum cleaning applications, and especially environments with high temperature, dusty air, or high flow rates. Common applications include laboratories, air circulation test equipment, smoke purification, and exhaust systems. The AFMB is designed for use with differential pressure (DPV) transmitters, similar meters, or gauges.
For installation accuracy, the AFMB features -10~30mm scale rulers at both ends, which aid in confirming correct insertion at the duct's midpoint. The integrated flange ensures reliable duct installation with good air tightness.
Specifications
Parameter
Value
Length
100~3000mm, see models
Velocity Range
3~100m/s (9~10000Pa)
Accuracy
< 3% (related with the install position, quantity of blades installed and the matched DP transmitter)
Repeatability
< 0.3%
Operating Temperature
Up to 85°C
Max Pressure
1 bar (static pressure)
Coefficient
0.82
Material
Die cast aluminum, nickel-plated copper nozzle, PC flange
Note
Once installed, it is recommended to adjust the readout of the matched transmitter to the value of another precision air flow meter, to complete a calibration to improve the accuracy
