Clamp-on ultrasonic flow measurement for steam

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World's first clamp-on saturated steam ultrasonic flowmeter


Flowmeter for steam

Clamp-on saturated steam ultrasonic flowmeter capable of measuring steam flow without the need to cut piping.

It was previously difficult to measure the steam flow used in factories in various industrial sectors, but this flowmeter can now be installed even when the equipment is in operation.


Measure the steam flow with precision thanks to a new noise reduction technology, whatever the pressure (from 0.1 MPa (G)) and temperature (up to 180 ° C).




Ultrasonic steam flowmeter applications

Applications :

  • District heating
  • Metal industry
  • Pulp and paper industry
  • Heat exchangers
  • Food and pharmaceutical  (autoclaving, cleaning and sterilization process)
  • Boilers ancillaries (combustion air preheaters)

Advantages of the flowmeter
non-intrusive steam

conventional-in-line-type-vs-new-clamp-on-typeAdvantages :

  • Easy, quick, economical and secure installation
  • Reliability and precision measurements
  • Maximum flexibility and wide range applications
  • Early detection of steam leaks
  • Process monitoring and corrective actions
  • Low maintenance and use
  • Designed to last in harsh industrial environments




Mounting methodClamp-on type
Measurement fluidSaturated steam
Measuring methodTransit time difference
Flow velocity0 to ±50 m/s
AccuracyFor required straight pipe length (upstream: 20 D or
longer; downstream: 10 D or longer)
Flow velocity 10 m/s or less: ±0.3 m/s
Flow velocity 10 to 30 m/s: ±3% of rate
Flow velocity above 30 to 50 m/s: ±5% of rate
Required straight pipe lengthUpstream: 20 D or longer; downstream: 10 D or longer
Piping materialCarbon steel, stainless steel
Pipe diameter50 A (diameter size lineup expansion under development)
Pipe thickness2.8 to 3.9 mm
Fluid temperature120 to 180°C
Fluid pressure0.1 to 0.9 MPa (G)
Moisture and splashWetness: 0%, there should be no splashing
(For mass flow rate conversion)
Current input (4 to 20 mA DC) ×1
Temperature input (resistance bulb) ×1 (optional)
OutputCurrent output (4 to 20 mA DC) ×1
Total pulse output ×1
Contact output ×1
Mass flow rate
Fixed value input (density)
· temperature input
· pressure input
CommunicationRS-485 (optional)
Ethernet (optional: under development)
Power supply/consumption100 to 240 V AC, 20 VA
Degree of protectionIP67 (with connectors fitting)
Ambient temperature-20 to +60°C
Ambient humidity95% RH or less
GroundingClass D grounding with ground resistance of 100Ω or less



Characteristics of the ultrasonic flowmeter for steam

Characteristics :

  • High accuracy
           Steam flow rate can be measured in the 0 to 50 m/s range, and high-precision measurement at ±3.0% of rate (10 to 30 m/s) is possible.
  • Measurement possible from low pressure (low temperature)
           Steam flow rate can be measured from a low pressure of 0.1 MPa (G) (temperature: 120°C).
  • Zero pressure loss
           No pressure loss,due to mounting externally on pipes.
  • High-speed calculation
           The flowmeter is equipped with a high-performance CPU, offering high-speed response of 0.2 seconds.
  • Mass flow rate conversion
           Mass flow output is possible by conversion with volume flow and density input. Density can be adjusted by pressure and temperature input.
  • Various communication functions
           The flowmeter is equipped with communication functions such as RS-485 (Modbus specification) and Ethernet (under development), which is capable of carrying out self-diagnosis as an IoT terminal device, and features a remote diagnosis function.
  • Multi-lingual
           The following languages are supported for display: Japanese (Katakana), English, German, French, Spanish.
Clamp-on ultrasonic flow measurement for steam documentation