Hello, friends, I hope all of you are enjoying your life. In today’s tutorial, we will have a look at ultrasonic Flow Meter. The ultrasonic flow meter is used to measure the value of the rate of liquid or through releasing ultrasonic waves about the pipe in fluid flow direction and reverse direction. Analyzing the difference in wave traveling times measures flow rate. it comes with 2 transmitters and two receivers each configured on opposite sides of the pipe for a certain location to find accurate results
In today’s post, we will have a detailed look at its working, applications, advantages disadvantages, and some other related parameters. So let’s get started with the ultrasonic flow meter.
Ultrasonic Flow Meter
- The ultrasonic flow meter is a device used for measuring flow rate with the use of an ultrasonic beam.
- it is known as a volumeter flow meter that uses air bubbles or small particles in liquid flow. This meter is mostly used for wastewater applications and is not good for distilled water.
- It is used mostly for chemical-compatible low-pressure loss applications.
- This meter affects the audio features of liquid and also affect density and temperature.
Working of Ultrasonic Flowmeter
- The design of the ultrasonic flow meter comes with stream and downstream sensors, sensor pipes, and reflectors.
- This meter works on a principle that uses sound waves to find the velocity of the liquid.
- Two conditions are followed for fluid measuring no flow and flow.
- In no flow condition, ultrasonic wave frequency is transmitted in the pipe and has the same fluid indication.
- For 2nd method reflected wave has a different frequency due to the Doppler effect.
- If fluid flows fastly in a pipe there is a linear increase in frequency. The transmitter processes signal from wave and wave reflection helps to find the flow rate.
- Transmitter timers transmit and receive ultrasonic waves in both directions of the pipe. For no flow condition flow rate is the same for upstream and downstream.
How to select the Right Magnetic flow Meter?
- Follow these factors for selecting a magentic flow meter
- Check its price
- Power supply features.
- Based on applications
- Accuracy and Range Accuracy
- Upstream/Downstream Pipin’
How to Install an Ultrasonic Flow Meter
This meter must be configured upper side of the horizontal pipe and connected over the pipe where ten times the pipe diameter upstream and five times the pipe diameter downstream of the flow meter do not have flow hindrance.
Not have pipe bends, fittings, or valves for these distances
Advantages of Clamp-On Ultrasonic Flowmeters
- These are some advantages of the clamp-on ultrasonic flowmeter.
- It provides nondisturbance measurements of flow.
- It can be used for the fluid calculation of nonconductive liquids.
- It can be easily mounted in any fluid pipe without any disturbance in the movement of flow.
- It can be installed in a pipe’s diameter of 12.7 to 7600 millimeters.
- It operation temperature is from minus forty Celsius to two hundred degree Celsius.
Comparison of Ultrasonic vs Other Types of Meter
| Meter Type | Features |
| Coriolis |
This meter can be used to find the flow of medium and large-diameter pipes.
|
| vortex |
It is less invasive and has less flow ability.
|
| Magnetic flow meter |
It can be used to find the flow rate of gases steam and nonconductive fluids.
|
| DP |
In this meter, less pressure loss is needed during recalibration.
|
| turbine |
In this module, there is no moving part and it is less invasive.
|
Ultrasonic Flowmeter Features
- These are some features of the ultrasonic flow meter.
Flow range
- Its flow range is 0.01-20 meters per second in both directions.
accuracy
- Plus-minus 0.3 to five percent.
Repeatability
- Normally 0.5 percent plus-minus.
Pipe Size
- 12.7 to 7600 millimeters.
Power
- It has a built-in battery with a 12-volt input supply its operation time is eight to 36 hours.
Operating temperature
- transducer: -40 Celsius to plus two hundred Celsius.
- transmitter: -10 to fifty centigrade
Data logging
- Its value is normally larger than the 100000 data points.
Dimensions
- 250 x 150 x 40millimeter
output
- Four to 20 milli ampere pulse (signal)
weight
- One to two kilograms.
Ultrasonic Flowmeter Installation Requirements
- For the required accuracy, these conditions must be kept in mind before installation.
| Requirements | |
| Location |
Larger than ten diameters for straight-length pipework must exit at the upward-moving stream of fluid and five diameters for down moving fluid stream.
|
| Wall thickness |
For good accuracy, pipe thickness should be calculationable. Some meter has thickness gauge meters.
|
| Liquid medium |
Before installation, it must know the category of fluid, and the bubble ratio in fluid should not be greater than five percent.
|
| Pipe conditions |
At the external wall of the fluid pipe, there should be no dust, paint or other related material exits.
|
Advantages
- This meter has no restriction for liquid flow
- It provides a good response
- It provides output in analog-type
- It uses less energy.
- It is best for larger mass flow measurements.
- It can easily connect and maintain.
- It does not make contact with liquid and does not have chance of leakage.
- It provides high accuracy.
- The output of the meter changes based on liquid termeprarue, viscosity, and density.
- It has two directions of liquid flow.
Disadvantages
- As compared to another mechanical flow meter it is high cost.
- it has a complex design
- Its audible part is high cost.
- It is used to measure concrete pipes.
- It operates when there are holes or air bubbles in pipe.
Faqs
What type of flow meter is ultrasonic?
- Ultrasonic flow meter has 3 main types. Transmission flow meters are differentiated into inline and clamp-on types.
- Ultrasonic flow meters use Doppler shift and are known as reflection or Doppler flow meters.
What is the principle of Doppler ultrasonic flow meter?
- The Doppler ultrasonic flow meter employs transducers for releasing an ultrasonic beam in a stream of pipe. For a flow meter to work, it must define particles like solid particles or air bubbles that help to reflect the ultrasonic beam.
What is an USM flow meter?
- The ultrasonic flow meter also called the non-intrusive Doppler flow meter is a volumetric flow meter that needs bubbles to measure the flow rate.
- Ultrasonic flowmeters are best to use for wastewater flow measurements.
What are the two types of flow meters?
- The commonly used flow meters are volumetric flow meters and mass flow meters and each performs the same functions. A volumetric flow meter is used for measuring volume and a mass flow meter measures mass.
What are the limitations of an ultrasonic flow meter?
- Ultrasonic flowmeter not used for contaminated liquids. Especially for types of liquid that do not provide ultrasonic energy not measured with an ultrasonic flow measurement device.
What is the principle of flow meter?
- Electromagnetic flowmeter working based on Faraday law of electromagnetic induction for measuring flow. If fluid of conductive fluid passes in the pipe and electrode voltatge E is induced in pairs of electrodes put at 90 degrees to a direction for the magnetic field.
What is the main function of a flow meter?
- The flow meter is used for measuring liquid or gas movement through pipe at a certain times. Through measuring flow rates flow meters provide a visible view of flowing material in pipes, or drainage system
What is the difference between ultrasonic flow meter and a mass flow meter?
- Ultrasonic flowmeter offers repeatable value and correct results enough to use for custody transfer applications.
- Mass flow meters retain a temperature differential between two temperature sensors connected to the rod.
What are the different types of ultrasonic flow meters?
- The two basic types of ultrasonic flow meters are transit and Doppler flow meters. Transit time flow meters measure the time difference between upstream and downstream signals, and the Doppler flow meter uses the Doppler effect to measure the velocity of the fluid.
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So friends this the detailed tutorial on the ultrasonic flow meter I have mentioned each and every parameter related to this meter in this post. If you still have any queries about this module ask in comments. I will resolve your queries regarding this meter. Thanks for reading. See you in the next tutorial.
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