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Flow Portable Ultrasonic FlowmeterUL6400


UL6400 PDF

*Specifications are subject to change without prior notice.

UL6400 is the portable type ultrasonic flowmeter driven by an builtin battery.
Anytime and anywhere, the handy ultrasonic flowmeter measures the various kinds of liquid flow rate just by clamping the sensor on the surface of the existing process lines and by easy setting-up of parameters.


  • · Wide measuring ranges

    A set of UL6400 covers the wide ranges of flow measurement from 15 mm to 1500 mm in pipe sizes.

  • · Portable and easy to handle

    With all instruments and accessories packed, you can carry and store a rugged plastic trunk with casters anywhere you want.

  • · Battery driven

    The built-in battery allows UL6400 to work as long as 14 hours without charging. The attached AC adapter makes UL6400 work continuously while charging the battery.

  • · High performances

    Not only the flow rate and total flow, but also the measuring status, error messages and battery power are displayed. Data are stored in the USB memory for further data processing.

  • · Compensation of flow rate in low Reynolds number domain

    Inputting the kinematic viscosity compensates the flow rate in the low Reynolds number domain using inhouse calculation function.

  • · Lining pipe

    By inputting the lining data, flow rate in lining pipe is measured without time-consuming calculation.

Short Specifications

Measuring method Ultrasonic time flight system
Measuring fluid The liquids which ultrasonic waves transmit through
Fluid temperature -40°C to 120°C at the exterior surface of the pipe
Flow velocity 0.5 to 20 m/s
Accuracy ±1.0 % of the reading for pipe size 50 mm or more and velocity 0.5 m/s or more
±3.0 % of the reading for pipe size less than 50 mm and velocity 0.5 m/s or more

Above accuracy is based on the following calibration conditions.
Measuring fluids: Water at 20°C
Upstream straight runs: 10 D
Measurable piping
Carbon steel, Stainless steel, PVC, PP, FRP, Lining materials
Measurable nominal
piping dia.
15 mm to 1500 mm ( Pipe outside diameter must be 20 mm or more )
Display 4.3 inch TFT-LCD with backlight by LED

No.1 and No.2 screen: 
Selectable from flow rate, total flow,flow velocity, Reynolds No., Ultrasonic propagation velocity, ultrasonic signal propagation status or else
No.3 screen: 
Bar graph presentation
No.4 screen: 
Error message presentation
External memory USB memory
Power supply
Built-in lithium battery: 
Continuous operation for approximately 14 hours, Rechargeable in 8 hours
AC adapter: 
90 to 264 VAC, 47 to 67 Hz
Protection class IP67
Sensor signal cable 3m