Overview of ultrasonic flowmeters and model comparison list
| Overview of ultrasonic flowmeters |
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| Ultrasonic flowmeter |
The ultrasonic flowmeter is a device that transmits ultrasonic signals through the fluids in a pipe. By measuring the differences in the signal propagation times, it determines the flow volume in the pipe. |
| Measuring principles of ultrasonic flowmeters |
There are various measurement methods; here, we will explain the transit-time method we use in our products. With this method, ultrasonic signals are transmitted upstream and downstream at a diagonal direction through the fluids in a pipe, and the difference in the propagation times for the upstream and downstream signals is used to determine the flow velocity. The flow volume is determined by multiplying the cross section of the pipe by the flow velocity. |
| Transducer installation |
Sensors are mounted in various ways. We will explain the clamp-on method used in our products. With this method, sensors are mounted on the outer surface of the pipe, eliminating the need for piping work. In addition, not having the sensors in direct contact with the fluids is an advantage. (Corrosion resistance and pressure loss are no longer an issue, and there is no risk of contamination.) |
| Ultrasonic flowmeter models |
Both fixed and portable models are available. The fixed type is permanently installed at a measuring site, whereas the battery-powered portable type can be used to perform maintenance and inspections in various locations. |
| Reference materials for ultrasonic flowmeters |
Catalogs, general specifications, and drawings can be downloaded from our website.
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| Ultrasonic flowmeter model comparison list |
| Item |
Model |
| US300PM |
US300FM |
| Type |
Portable-type |
Fixed-type |
| Main use |
Measurement of
flow volume for the
purpose of facility
maintenance and inspection |
Flow volume monitoring
at factories and
other facilities |
Applicable pipe sizes
(inner diameter except in the case of a
6,500mm pipe, when the outer
diameter applies) |
Small to large
(25 to 6,500 mm) |
Small to large
(25 to 6,500 mm) |
| Functions |
Pipe wall thickness measurement
(with portable-type) |
Available |
- |
High fluid temperature sensor
(up to 200˚C/392˚F) |
Available |
Available |
Multi-path measurement
(averaging function) |
Two-path (max.) |
Two-path (max.) |
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