info@hbmeter.cc
+86 152 3780 0315

Inline Ultrasonic Flow Meter

Non-Invasive Flow Measurement Without Process Penetration

Precision flow measurement using ultrasonic transducers integrated into a flanged or threaded spool piece—measuring clean liquids with ±0.5% to ±1.0% accuracy through transit-time technology. The meter installs in-line like traditional flowmeters but measures flow without mechanical moving parts, pressure sensors, or flow restrictions, delivering long-term reliability for water, chemicals, and oil applications in pipes from DN15 to DN600.
  • Pipe Size: DN15 – DN6000 (½" – 240")
  • Flow Accuracy: ±0.5% to ±1.0% of reading
  • Velocity Range: 0.1 – 12 m/s (bidirectional)
  • Temperature: -20°C to +160°C (meter dependent)
  • Pressure: PN10, PN16, PN25, PN40 (flange rating)
  • Display: Flow rate, velocity, totals, diagnostics
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Transit-Time Ultrasonic Technology in Compact Spool Design

Four reasons inline ultrasonic meters outperform mechanical flowmeters for clean liquids

Eliminate Bearing Wear and Mechanical Failure Modes

Transit-time ultrasonic measurement has zero moving parts—no turbine blades, impellers, or bearings to wear. Accuracy remains stable over 10-15 year service life without drift or degradation. Eliminates bearing replacement, rotor cleaning, and recalibration typical of mechanical flowmeters. Ideal for continuous process applications requiring long-term reliability.

  • 10-15 year stable accuracy—no moving parts to wear or maintain

Reduce Pumping Energy Costs With Near-Zero Flow Restriction

ull-bore or near-full-bore design creates minimal flow obstruction—typically <0.5 psi pressure drop versus 5-25 psi for turbine, vortex, or differential pressure meters. Reduces annual pumping energy costs while enabling measurement in gravity-fed systems and low-pressure applications where pressure drop cannot be tolerated.

  • <0.5 psi pressure drop—90% lower than mechanical flowmeters

Achieve ±0.5% Accuracy for Custody Transfer and Critical Processes

Transit-time technology delivers ±0.5% accuracy (±1.0% standard) with ±0.2% repeatability—superior to turbine meters at low flows and vortex meters at all conditions. Suitable for custody transfer, batch verification, and process control where measurement precision directly impacts product quality or billing accuracy.

  • ±0.5% accuracy—meets custody transfer requirements

Measure Forward and Reverse Flow in Reciprocating Systems

Automatically detects flow direction and accurately measures both forward and reverse flow—essential for batch processes, pump testing, and systems with flow reversals. Totalizes net, forward, and reverse volumes separately. Eliminates need for check valves or dual flowmeters in bidirectional applications.

  • Bidirectional measurement—one meter handles flow reversals
Parameter
Specification
Measurement Principle
Transit-time ultrasonic (integrated transducers in meter body)
Installation Type
Inline spool piece (flanged or threaded connections)
Pipe Size Range
DN15 – DN6000 (½" – 240")
Flow Accuracy
±0.5% of reading (calibrated) | ±1.0% of reading (standard)
Repeatability
±0.2% of reading
Velocity Range
0.1 – 12 m/s (bidirectional)
Turndown Ratio
1:100 (wide range capability)
measurement interval:
64ms/s(flow resolution: 0.001m/s)
Fluid Temperature
-20°C to +80°C (standard) | -20°C to +160°C (high-temp option)
Fluid Requirements
Clean liquids: particle content <1%, gas content <3%, particle size <100μm
Conductivity
Not required (works on non-conductive fluids—oil, DI water, solvents)
Viscosity
Up to 1000 cP (higher viscosity reduces accuracy)
Reynolds Number
>4000 preferred (turbulent flow for best accuracy)
Meter Body Material
Carbon steel (standard), SS304, SS316L (corrosive fluids)
Transducer Location
Integrated into meter body wall (permanently installed)
Bore Design
Full bore (no restriction) or reduced bore (cost-optimized)
Power Supply
100-240V AC (50/60Hz) or 12-36V DC
Output Signals
4-20mA (isolated), Pulse, Frequency, RS485, RS232, Relay
Communication
Modbus RTU, Modbus TCP/IP, HART, Profibus DP (optional)
Data Logging
10,000+ records internal memory
Display
LCD with backlight, display accumulated flow/heat, instantaneous flow/heat, velocity, time etc.
Protection Rating
Sensor housing: IP67, Converter: IP65 (integrated or remote)
Configuration
Integrated (sensor + converter combined) or Split (remote converter)
Quality Certifications
CE, SIL-3

Precision Flow Measurement for Clean Liquid Applications

High-accuracy measurement for water, chemicals, and oil applications requiring reliable long-term performance

  • Water & Wastewater Treatment

    • Potable water distribution
    • Process water measurement
    • Ultrapure water systems
    • Deionized water (non-conductive)
    • RO permeate and concentrate
    • Final effluent monitoring

  • Chemical & Petrochemical

    • Raw material receiving
    • Batch process measurement
    • Product transfer and loading
    • Reactor feed control
    • Heat exchanger flow monitoring
    • Clean chemical transfer

  • Oil & Refined Products

    • Crude oil metering
    • Refined product custody transfer
    • Lubricating oil blending
    • Hydraulic oil systems
    • Fuel oil measurement
    • Pipeline allocation metering

  • Food, Beverage & Dairy

    • Beverage ingredient dosing
    • Dairy product transfer
    • Edible oil metering
    • Juice concentrate flow
    • Syrup and liquid sugar
    • CIP solution monitoring

  • Pharmaceutical & Biotech

    • WFI distribution systems
    • API transfer measurement
    • Solvent and reagent metering
    • Buffer and media preparation
    • High-purity water monitoring
    • Cleaning solution verification

Proper installation ensures accurate and reliable measurement

 

Step 1: Preparation

 

  • Pipe Section: Cut or prepare pipeline section for meter installation. Verify flange bolt pattern and pressure rating match meter connections.
  • Gaskets: Select appropriate gasket material for fluid and temperature. Standard: EPDM (water), Viton (chemicals), PTFE (aggressive fluids).
  • Alignment: Ensure upstream and downstream pipe sections are properly aligned. Misalignment causes stress on meter body and connection leaks.

Step 2: Mechanical Installation

 

Flanged Connection:

 

  • Position meter with flow direction arrow matching actual flow
  • Install gaskets between meter and pipe flanges
  • Insert flange bolts and tighten in star pattern to specified torque
  • Verify no gaps between flange faces

 

Threaded Connection (DN15-DN50):

 

  • Apply PTFE tape or thread sealant
  • Thread meter into fittings per standard pipe practice
  • Support meter body—do not hang pipe weight from meter
  • Verify flow arrow direction before final tightening

 

Step 3: Electrical Installation

 

  • Power Connection: Connect AC or DC power per voltage rating. Verify supply voltage before energizing.
  • Output Wiring: Wire 4-20mA, pulse, or communication outputs to receiving instruments. Observe polarity and load resistance limits.
  • Grounding: Connect meter ground lug to facility ground for proper operation and electrical safety.

 

Step 4: Commissioning

 

Parameter Entry:

 

  • Verify pipe size matches meter size
  • Enter fluid type and temperature
  • Set flow units (m³/h, L/s, GPM, etc.)
  • Configure output scaling

 

Accurate Flow Measurement for Your Clean Liquid Applications

Get precision ultrasonic metering without moving parts. Specify pipe size, fluid type, and accuracy requirements—receive sizing and pricing within 24 hours.
info@hbmeter.cc
(+86) 152-3780-0315
1 Jingsan North Road, Xiangfu District, Kaifeng, Henan 475004 China

About HBmeter

AFT Instruments is a high-tech manufacturer delivering precision flow instrumentation for water, chemical, power, industrial automation, and process industries.
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info@hbmeter.cc
(+86) 152-3780-0315
(+86) 152-3780-0315

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