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Special Character & Function of Ultrasonic Flowmeter

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Ultrasonic flow meters mainly have 2 types: open channel type and transit-time pipe line type. Both of them can measure flow by transmitting and receiving ultrasound wave. There isn't a flow meter which can meet all of applications, Ultrasonic Flowmeter is a very useful measure instrument, ultrasonic flow meter is no exceptional. Users should do a right selection as the actual situation. But if possible, it is better to select digital flow meter without moving parts, e.g. ultrasonic flowmeter.

portable ultrasonic flowmeter

EU-109 Portable Ultrasonic Flow meter for pipe line

The EU-109H Ultrasonic Flow Meter is a portable instrument which could...


An ultrasonic flow meter is a type of flow meter that measures the velocity of a fluid with ultrasound to calculate volume flow. Using ultrasonic transducers, the flow meter can measure the average velocity along the path of an emitted beam of ultrasound, by averaging the difference in measured transit time between the pulses of ultrasound


Because the ultrasonic sensor is not in contact with the water, ultrasonic sensors have no scheduled maintenance.  Ultrasonic sensors are not affected by chemicals, grease, suspended solids, or silt in the flow stream.


An open channel ultrasonic flow meter is one of the most versatile, accurate measurement tools on the market today because it uses sound to determine the water level in your system. When an ultrasonic flow meter takes a reading, it emits a high-frequency sound puce towards the surface of your flow, where it will hit the water and create an echo. The flow meter measures how long it takes the echo to return to the meter, and this is how it determines the flow level.

Open Channel Flowmeter GE-1208

Open Channel Ultrasonic Flowmeter GE-1208

GE-1208 Open Channel Ultrasonic Flowmeter could work with Parshall flume...


The Transit-time pipe line type flow meter mainly utilizes clamp on flow transducers to detect flow in closed pipe. Clamp on flow meter is an unique measurement way and at present, ultrasonic flow meter is the main type with such way at present. Thus, it is very essential to know its advantages as below:


1.No Pipe Cutting
Clamp on installing way doesn't need to cut pipe. This is very different from traditional flow devices. Users just need to clamp the flow sensor to pipe surface. Then ultrasonic flowmeter can detect flow by ultrasound wave and then automatically calculate the value of flow velocity, flow totalizers, etc.

2.No Direct Contact to Fluid
Clamp on flow sensors don't need to contact fluid directly. It avoids pollution to the fluid. This can meet special requirement of food, medical, chemistry, biology, etc.

3.No Risk of Leakage
No pipe cutting means no need to damage pipe. So only pipe condition is good, clamp on flow meters won't provide a leakage possibility. This advantage is more suitable for strong acid, alkali, poisoning, corrosive liquid, etc.

4.No Moving parts
Traditional mechanical flow meters must use moving parts to ‘sense' flow. This will destroy the flow status. Meanwhile, the flow accuracy will degrade as using of moving parts.As its using, the moving parts will become bad and users have to replace a new flow measurement device.
wall mount ultrasonic flowmeter

EU-108 Wall Mount Ultrasonic Flowmeter

EU-108 Ultrasonic Flow Meter is a fixed mounted flow meter, the flowme...


5.No Pressure Loss
Ultrasonic flowmeter has no moving parts and doesn't need to contact fluid, so there is no pressure loss. No pressure loss means you don't require to do pressure compensation and it can save cost of pressure transmitter.

6.Wide Turndown Ratio
Turndown ratio is a very important technical specification in flow measurement. It is used to refer to flow range and usually decided by flow technology/principle.

Traditional flow meter has a small turndown ratio, e.g. turbine flow meter is 10:1,orifice plate flowmeter is 3:1,PD flowmeter is 10:1,etc. But ultrasonic flow meter is usually 100:1 and part of models can reach R500.
If you are interested in more details of turndown ratio, please visit Wikipedia to learn more.

7.Low Flow Startup
Low flow measurement has been a hard problem since flow measurement available. For small size pipe, people can develop special flow devices to test. But because of special, its price is always very high and is not easy to promote for common application. Ultrasonic flow meters can provide a very low flow measurement for process control. Various type of ultrasonic flow meters have been developed for low flow measurement.

8.No Future Maintenance
As there is no moving parts and no pipe cutting, clamp on ultrasonic flow meters won't almost require bigger maintenance. This can save end users with huge money and time. Meanwhile, even though it requires maintenance, the flow won't be stopped and production can continue

9.Higher Accuracy
Its long-term accuracy is proven to be better than traditional mechanical flow meters. Of course, if clamp-on flowmeters can't meet your extreme requirement of accuracy, inline and insertion ultrasonic flow meters are better choice.

10.Versatile Outputs and Data Storing
Ultrasonic flow meters can be equipped with versatile outputs:4-20mA,pulse,relay, RS485,Modbus,M-bus,Hart, batch controller, etc. Especially Modbus, it is easy to make network and provide convenient data reading and system monitor for District Metering Area(DMA).
Meanwhile, we also develop big memory storing data logger for our ultrasonic flow meters and related data management software is available.

11.Low Power Consumption
Ultrasound technology provides possibility to develop low power consumption ultrasonic flow meters. This features plays an important role in ultrasonic water meter and ultrasonic heat meter. With a built-in 3.6V battery, they can work for 6-10 years.

12. Easy Portable Flow Measurement
Thanks to low power consumption and clamp on measurement way, portable ultrasonic flow meter is developed accordingly. The portable flow meters provide much convenience for flow test and flow survey. It is a powerful tool.

13.HVAC Energy Management, Reduce Your Cost
Our ultrasonic flow meters provide advanced and precision energy measurement and widely used for water energy monitor in HVAC management. The combination of clamp on flow and RTD products a clamp on energy measurement and doesn't need to damage pipe. High accuracy and stable performance can help to reduce your energy cost.
CE certification of ultrasonic flowmeter


CE certification of ultrasonic flowmeter


14. Low Cost Ownership
Many users may have a first impression that advanced flow meter always has a high price. The first investigation may be higher than mechanical flow meters. But plus installing fee, life span and maintenance, its total cost is not higher, even lower.

15. If pipe contains bubbles or holes in it, clamp on meter may not work well, the open channel flowmeter could work for this condition.



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