Technical Specifications:

• Nominal Pipe Size: 50 mm (2 inches, DN50)
• Connection Type: Flanged (JIS 10K/16K/20K, ANSI 150/300, DIN PN16/PN40)
• Flow Rate Range (Liquid): 0.8 to 80 m³/h (water equivalent)
• Flow Rate Range (Gas): 40 to 4,000 Nm³/h (air at 0°C, 0.1013 MPa)
• Flow Rate Range (Steam): 50 to 3,000 kg/h (saturated steam)
• Measurement Accuracy (Liquid): ±0.75% of reading (Re ≥ 20,000)
• Measurement Accuracy (Gas): ±1.0% of reading (Re ≥ 20,000)
• Measurement Accuracy (Steam): ±1.5% of reading
• Repeatability: ±0.1% of reading
• Output Signals: 4–20 mA DC (HART 7), pulse output, Modbus RTU, FOUNDATION Fieldbus
• Power Supply: DC 24 V (low-power version) or AC 85–265 V
• Protection Rating: IP67 (transmitter housing)
• Ambient Temperature: -30°C to +80°C
• Process Temperature: -40°C to +250°C (depends on configuration)
• Process Pressure: Up to 4.0 MPa (depends on flange rating)

Material Composition (HAB1 Configuration):

• Sensor Body: SUS316L stainless steel (forged)
• Bluff Body: SUS316L stainless steel
• Piezoelectric Element: PZT ceramic
• Flanges: Carbon steel with epoxy coating or SS316L
• Housing: Aluminum alloy with epoxy coating (IP67)

Model Code Breakdown:

• AXF050H: AXF series, 50 mm, flanged connection
• E2: Output configuration (4–20 mA + HART + pulse)
• AL1N: Communication protocol (Modbus RTU + HART)
• HAB1: Process connection material (SS316L body, SS316L flanges)
• 41B/CH: Special options (CH indicates specific country/calibration configuration)

Working Principle:
A bluff body (shedder bar) is placed in the flow stream. As fluid passes the bluff body, von Kármán vortices are shed alternately from each side. The vortex shedding frequency is directly proportional to the flow velocity (Strouhal relationship). The piezoelectric sensor detects the pressure oscillations caused by the vortices, and the SpectraSignal™ digital filter extracts the true vortex frequency while rejecting mechanical vibration and flow noise.

Advantages & Highlights:

• No moving parts — high reliability and zero maintenance
• Wide turndown ratio: 30:1 (typical), up to 100:1
• SpectraSignal™ technology provides excellent vibration immunity
• Simultaneous measurement of volumetric flow, mass flow, and totalized flow
• Multi-variable output: flow rate, temperature, pressure compensation

Applicable Industries:

• Steam measurement in power plants and cogeneration facilities
• Natural gas and compressed air metering
• Chemical processing (acids, solvents, slurries)
• Food and beverage (milk, juices, beer)
• Pharmaceutical water systems (WFI, purified water)

Installation Requirements:

• Minimum 15D upstream and 10D downstream straight pipe (D = pipe diameter)
• Install with sensor in vertical position for liquid service (horizontal for gas/steam)
• Ensure pipe is fully filled with fluid (no air pockets for liquid service)
• Ground the transmitter housing to plant ground

Usage Precautions:

• Minimum Reynolds number required: Re ≥ 10,000 for accurate measurement
• Do not install near pumps, valves, or elbows that cause flow disturbance
• For steam service, ensure steam is dry (quality ≥ 95%) or use a steam trap upstream
• Verify zero-point calibration with no-flow condition before commissioning