15 Advantages of Ultrasonic Flowmeter Make it Unique. Its long-term accuracy is proven to be better than traditional mechanical flow meters. Similar to many of the devices we examined in Not All Flow Meters Are Created Equal! The ultrasonic flow meter provides numerous advantages over other types of flow measuring meters. Ability to use multi-path techniques for flow profiling in large pipes or open channel applications. An ultrasonic gas flow meter measures natural gas for custody transfer and is used throughout the network in gathering, transmission, and distribution. Turndown ratio is a very important technical specification in flow measurement. # Ultrasonic flowmeters are more expensive than the Doppler version. In the case of steam, steam density, , can be readily computed using a steam table if temperature, pressure and steam quality are known. This website uses cookies to improve your experience while you navigate through the website. However, to alleviate some of its inaccuracies, transit-time ultrasonic meters can also use in multiple path configurations to achieve higher accuracies. The ultrasonic gas flow meter is a velocity-type flow meter, a classification of meters that includes turbine meters and vortex meters. Best Flow Technologies for Each Fluid State, Estimated Cost of Various Flow Technologies, Flow Technologies & Process Limits - Metric, Obstruction less flow clamp on outside the pipe, Pressure drops equal to an equivalent length of straight pipe, Accuracy about 1% of flow rate standard and 0.5% with dual path. The ultrasonic signals are generated by piezoelectric crystals applying a voltage. The difference between these two amounts of time is directly proportional to the mean velocity of the liquid. You may have an interest in related posts: The scaling, pitting, and fouling that can occur over time in older piping systems can be problematic. Any shift in the frequency of reflections is proportional to the flow velocity. Traditional mechanical flow meters must use moving parts to sense flow. Linc Energy Systems has a great product line, and their customer service can't be beat!". Magnetic Flow Meter Working principle, Advantages, and Limitations. This difference in time is proportional to the velocity of the flow. # Ultrasonic flowmeters are no moving parts, need not worry about its wear and tear issues. Dirty gas degrades the meters accuracy, though ultrasonic flowmeters handle impurities better than turbine meters. Clamp on flow meter is an unique measurement way and at present, ultrasonic flow meter is the main type with such way at present. Users should do a right selection as the actual situation. For a simple application like water, there are a dozen different technologies that can work well. This type of flowmeter requires objects in the flow stream. Learn how performance and deviation from control limits can be visualized to allow operators and engineers to understand parameters affecting reliability. Additionally, it will determine the direction of the flow with the aid of an ultrasonic beam. Read more about the different types ofUltrasonic Flow meters: Clamp On Ultrasonic Flow MetersOpen Channel Flow MeterPortable Ultrasonic Flow MetersUltrasonic BTU Meters. A typical application for an Ultrasonic Flow Meter is measuring flow of liquid in full pipes, also measurement of liquids such as water, wastewater, acids and solvents, chemicals and hydrocarbons and oils, also to monitor and control heating, ventilation and air conditioning systems. With clamp-on sensors, the ultrasonic signals are passed directly on to the pipe wall into the fluid. Easy Portable Flow Measurement # Flow of both gases and liquids can be measured. Doppler ultrasonic flowmeters are based on the Doppler-shift or the phenomenon in which the wavelength of an approaching sound source is shorter than the wavelength of that same source as it is moving away. document.getElementById( "ak_js_1" ).setAttribute( "value", ( new Date() ).getTime() ); Susan Bender started selling to the natural gas industry in 1980. Your email address will not be published. Steam Measurement. We are grateful for our affiliation, which has been vital to our success. Currently, over 90% of ultrasonic fluid measurement uses transit-time ultrasonic technologies of various scan frequencies, unique algorithms, noise cancellation techniques. Ultrasonic flow meters will remain a measurement of choice due to their accuracy, reliability, wide range, no pressure drop and no regular maintenance. The incident wave hit the object or bubbles and reflects back as the reflected wave, the difference in the frequencies of the incident and reflected waves are measured which is proportional to the function of fluid flow in the stream. Ultrasonic flow meters can be equipped with versatile outputs:4-20mA,pulse,relay, RS485,Modbus,M-bus,Hart, batch controller, etc. Part 2, the accuracy of ultrasonic flow meters becomes much less dependable when the flow rate drops below 2 ft/s. If you are in the market for an ultrasonic flow meter, submit your inquiry here. 5.No Pressure Loss The AlsonicDSP product line flow transmitters use Cross Correlation to erase noise and make 3-d cross sections of the flow profiles travel speed through a pipe. Lets talk about water applications, for example. Linc Energy Systems is the contract manufacturer for our odorization system. Out of these cookies, the cookies that are categorized as necessary are stored on your browser as they are essential for the working of basic functionalities of the website. Usually used transducers are piezoelectric transducers. But ultrasonic flow meters can support 3 types of flow sensors.Complete facilities can ensureenough your reselling business and make you gain more orders. Transit-time flow meters are not suited for water with heavy aeration or high concentrations of solids or suspended particles as this can obstruct the sound waves. Therefore, Doppler ultrasonic flow meters are obviously better suited for aerated or impure water applications (i.e. The transducers send and receive ultrasonic pulses through the steam. It is mandatory to procure user consent prior to running these cookies on your website. Less time in the direction of flow and more time against the flow. Water must contain a certain amount of Microsiemens (uS), giving it the power to conduct heat and/or electricity. The mass flow is then calculated from temperature and pressure inputs and built-in steam tables. Users just need to clamp the flow sensor to pipe surface. This webinar covers vacuum basics including gas laws, vacuum measurements, vacuum pump sizing and much more. 15. You also have the option to opt-out of these cookies. If the reflected wave returns from a bubble advancing toward the ultrasonic transducer, the reflected frequency will be greater than the incident frequency. Learn the ins and outs of how AODD pumps work in this webinar. Linc Energy Systems 12450 W. Cedar Drive Lakewood, CO 80228 Get Directions Phone: 303.697.6701 Fax: 303.697.6744. The velocity of the fluid is indirectly measured by beaming an ultrasonic pulse from one transducer to the second one, and then back again. However Doppler techniques are used less and less as the technology of Transit-time is constantly being improved to measure dirty fluids with better accuracies than Doppler techniques. An insiders guide to maintaining electrical enclosure temperatures and protecting heat-sensitive equipment. These cookies do not store any personal information. Clamp on installing way doesnt need to cut pipe. Ultrasonic flow measurement technique, Advantages and disadvantages of ultrasonic flowmeters. If you are interested, please feel free to contact us. Why a 4-20 mA signal is used, not 0-20 mA or 0- 30 mA signal in Instrumentation ? 9.Higher Accuracy This article focuses on inline ultrasonic meters, not clamp-on. There are multiple industrial applications that call for the accurate flow measurement. Any cookies that may not be particularly necessary for the website to function and is used specifically to collect user personal data via analytics, ads, other embedded contents are termed as non-necessary cookies. 11.Low Power Consumption This can meet special requirement of food, medical, chemistry, biology, etc. Using a single ultrasonic flow meter to cover the full range results in lower capital and installation costs. Of course, if clamp-on flowmeters cant meet your extreme requirement of accuracy, inline and insertion ultrasonic flow meters are better choice. Doppler Ultrasonic Flow Meters also send a sound wave into the flow, but contrary to transit-time technology, Doppler meters depend on suspended bubbles and particles in the water to reflect the sound waves providing a shift in the frequency. Smartmeasurement is the only manufacturer that uses both low frequency transit-time technologies and high frequency technologies as well as Doppler techniques. No pressure loss means you dont require to do pressure compensation and it can save cost of pressure transmitter. What are the Advantages of an Ultrasonic Flow Meter? f = incident frequency Tom Michalowski is senior product manager for Panametrics, a Baker Hughes business. 4.No Moving parts They are non-invasive, and therefore can detect in-situ flow rates from outside the pipework, with no interruption to flow or the process. Since particles or bubbles in a stream flow at different speeds, it is impossible for this technology to measure all the particles/bubble velocities to calculate the true average flow in a flow stream. Upgraded technology improves White Rock, British Columbia, water quality and worker safety. Unfortunately, measuring steam flow is not easy. 12. The time lag in receiving the signal is proportional to the flow of the fluid. These cookies will be stored in your browser only with your consent. It avoids pollution to the fluid. This field is for validation purposes and should be left unchanged. The conductive media/liquid then creates a voltage as it passes through the flow tube and magnetic field of the meter. We are now a distributor of Global Power Technologies thermoelectric generators (TEGs). Also known as counter propagation flowmeter. Answering these questions will make a big difference in the types of flow meters that would be ideal for your system. When the flow starts in the measuring tube, the ultrasonic signals are accelerated in the direction of flow, de-accelerated in opposite direction. Traditional flow meter has a small turndown ratio, e.g. Transit-time measurements are used from low cost hot/cold water meters to large channels and rivers in more complicated open channel measurement using multipath techniques. 3 Types Flow Sensors Optional The AlsonicDSP product line are used in both fixed and portable application as well as more complicated Area Velocity open channel techniques for sewers, small channels and rivers. These sound waves are generated by a pair of transducers. Linc Energy Systems has always provided leadership, state-of-the-art technology, and exemplary customer service. t down = Time for sound pulse to travel from upstream location to downstream location, No moving parts and allow unabstracted flow, Unaffected by temperature, density and concentration. If youd like to discuss flow meter options for your processes, give us a call at (888) 556-3913 or email us at sales@cadillacmeter.com. However, using a flow meter with two ultrasonic transducers that do not protrude into the flow stream is more effective as transducer installation causes no pressure drop and reduces steam generation costs. Performance Characteristics of Measuring Instruments. Lets review their pros and cons. Heat exchangers use steam to transfer energy to increase or maintain the optimal temperature of another fluid. Michalowski has worked more than 20 years with Panametrics and is a former application engineer. These ultrasonic flow meters are used on closed full pipes and the transducer may be mounted either on the outside of the pipe or inserted (hot tapped) into the pipe. However, Transit-time fails to measure fluid flow accurately when there are bubbles and particles in the fluid stream which blocks the sound wave reaching across the pipe to measure its transit time. Ultrasonic flowmeters pass high-frequency sound wave to fluid path to measure the fluid velocity. Doppler technologies are only used where Transit-times techniques fails which is where there is a very high concentration of particles/bubbles.Both Doppler and Transit-time techniques have transducers that can either be inserted into a pipe or on the outside of a pipe. The combination of clamp on flow and RTD products a clamp on energy measurement and doesnt need to damage pipe. Variety of scan rates, noise cancellation, Digital Signal Processing (DSP), etc. ansportation, and refining industries fluids are nonconductive, the ultrasonic flowmeter excels in that market. Please give us as much detail as possible so we can provide the best response (product, model, p/n, manufacturer, size, quantity, etc. Benefits of Transit time Ultrasonic technologies, Benefits of Doppler Ultrasonic technologies. ), The Pros and Cons of the Ultrasonic Gas Flow Meter, https://www.lincenergysystems.com/wp-content/uploads/2020/02/lincenergy.svg, https://www.lincenergysystems.com/wp-content/uploads/2018/06/pros-cons-ultrasonic-meters.jpg, Mark Flemmer, Engineering Support Coordinator, Randall Bishop, Natural Gas Specialist, Amanda Koplin, CEO, Pipeline Conditioning. c = speed of wave in process fluid. Ultrasonic flow meters can provide a very low flow measurement for process control. turbine flow meter is 10:1,orifice plate flowmeter is 3:1,PD flowmeter is 10:1,etc. These products are often time low cost and for relatively clean and stable fluids gives users a smart solution in terms of a cost benefit ratio. Is noise an issue? They are nonintrusive as the transmitters clamp to the outside of the pipe. It is used to refer to flow range and usually decided by flow technology/principle. Combine pumping systems with integrated remote capabilities for long-term value. Device will not obstruct flow or contaminate processes, Lack of moving parts means less maintenance, Zero pressure drop (Magnetic flow meters also provide no pressure drop if you are installing a meter the same size as the line size), Operates on pipe diameters from 1/2 to 200 (may require 2 or 3 different sets of transducer depending on pipe size and range transducers cover), Insensitive to changes in temperature, viscosity, density or pressure (Temperature will effect the transit time sensor selection requiring high temp sensors above 250F. Clamp on flow sensors dont need to contact fluid directly. Part 2, Here is Why Energy Sector Industries Benefit from our HEATX-2 BTU Meters, Advantages and Disadvantages of Inline vs. Insertion Volumetric Flow Meters, Three Tips for Selecting a Hot/Chilled Water BTU System to Improve Accuracy, Three Tips for maximizing your Volumetric Flow Meters Efficiency, How to Simplify the Measurement of a Buildings Energy Consumption, A Guide to Different Types of Energy Meters [Infographic], Metering A Heating System: Condensate Vs. Necessary cookies are absolutely essential for the website to function properly. Using ultrasonic transducers, these flow meters can measure average velocity of along a beam of ultrasound, and then taking averages of the transit time (by measuring differences in pulses of ultrasound propagating into & against flow direction), or alternatively recording frequency shift using the Doppler effect. As a key player, we have been working hard to lower price of ultrasonic flowmeters. Doppler technologies are only used where the fluid which has a high concentration of solids and bubbles in the flow stream and often times cannot measure fluid flow accurately, due to its unique technique in using particle or bubble velocities in the flow stream to measure the overall flow rate of the fluid. But if possible, it is better to select digital flow meter without moving parts, e.g. 10.Versatile Outputs and Data Storing Steam has the challenge of operating at high temperatures and across a wide pressure range, from close to ambient pressures to significant high pressures, based on final use cases and requiring little pressure drop to not waste energy. c. If pipe contains bubbles or holes in it, clamp on meter may not work well. Doppler flow meters can measure dirty liquid and transit-time ultrasonic flow meter main measure clean liquid. 1.No Pipe Cutting The staff is responsive, collaborative, communicative, and places great effort in prioritizing our needs. Low Power Soil Moisture Sensor+ Temp.Sensor, The Best Wastewater Level Sensor&Sewage Tank Sensors, The Best Liquid Level Switch to Replace Float Switch, Poor Accuracy of DHT11 Temperature and Humidity Sensor, Not Recommend, A Case to Explain Flow Meter Switch Selection for Hydraulic Oil. An ultrasonic flow meter is a type of flow meter that can measure velocity of fluids with ultrasound technology (the sound generated above the human hearing range) to work out the volume flow. Nearly allof flow meters only have 1 or 2 type flow sensors optional: inline flow meter or insertion flow meters. Heating could take the form of warming a house or building to being a part of a large district heating system in which steam consumption is a significant concern due to billing and energy rebates. Difference between the Pressure Gauge with glycerin and without glycerin? Have questions about our Ultrasonic Flow Meters? What is NDT testing (Non-Destructive testing)? By increasing the sensors pairs, it is possible to accurately detect and mathematically compensate flow profile distortions. 2 Wire Transmitter with external power supply, Working Principle of Ultrasonic Flow Meters, Roles and Responsibilities of an Instrumentation and Control Engineer. document.getElementById( "ak_js_2" ).setAttribute( "value", ( new Date() ).getTime() ); Click to share on Twitter (Opens in new window), Click to share on Facebook (Opens in new window), Click to share on LinkedIn (Opens in new window), Click to share on Tumblr (Opens in new window), Click to share on WhatsApp (Opens in new window), Absolute, Gauge, Atmospheric, and Vacuum Pressures. When someone thinks of steam, heating and cleaning are the most common applications. Doppler open channel measurement can use one transducer to measure velocity, level and fluid conductivity. Not All Flow Meters Are Created Equal! There isnt a flow meter which can meet all of applications and ultrasonic flow meter is no exceptional. How to use smart instrument measurement for better monitoring and control. Save my name, email, and website in this browser for the next time I comment. Ultrasonic meters minimize the long-term cost of ownership. This features plays an important role in ultrasonic water meter and ultrasonic heat meter. Sound beam must transverse a representative cross section, therefore flow profile dependent, Powered by Discourse, best viewed with JavaScript enabled. If clamp on meter cant do it, our insertion and inline ultrasonic flowmeters can be a better solution. Transit time flow meter uses a pair of transducers both are capable of sending and sensing the sound signals. He holds a bachelors degree in chemical engineering and an MBA. technique? Magnetic flow meters are specifically designed for systems that move conductive fluids like water, acids, caustic liquids, and slurries. Any number of unknown internal piping variables can shift the flow signal and create inaccuracies. Our ultrasonic flow meters provide advanced and precision energy measurement and widely used for water energy monitor in HVAC management. Especially Modbus, it is easy to make network and provide convenient data reading and system monitor for District Metering Area(DMA). No pipe cutting means no need to damage pipe. The diagram below describes the theory of operation for Doppler techniques. Digital signal processing has made it possible to use a transmitted signal via the use of digital signal coding. Remote alarm notification software was a crucial component to the operation. These externally applied flow meters dont suffer any mechanical wear and tear. Having vendors such as Linc Energy Systems is paramount to assure product quality. 2022 Linc Energy Systems. We are an authorized distributor for Honeywell Elster Instromet ultrasonics: Q.Sonic, Q.Sonic-Plus, and TwinSonic-Plus. The ideal tool for potable water applications, clamp-on ultrasonic flow meters can also be used in wastewater treatment and collection applications. While selecting the proper flow meter technology for your system is critical, your ability to rely on the meters readings will depend more heavily on the application. Considerable costs are involved in maintaining, retesting and recalibrating other traditional flow technologies. SmartMeasurement s AlsonicDSP family of ultrasonic flow meters that use Digital Signal Processing techniques and their patented fine time measurement technologies that involve sound waves to be beamed at picoseconds to ensure accurate measurements of liquids that contain solids or gas bubbles. We will only use your email address to send you our newsletter. 2.No Direct Contact to Fluid This will destroy the flow status. We also use third-party cookies that help us analyze and understand how you use this website. t up = Time for sound pulse to travel from downstream location to upstream location This is the parameter being used by ultrasonic flowmeters to calculate the liquid flow rate. In addition, it is shown that flow velocity measurement is independent of the medium flowing inside the pipe. For more information, visit panametrics.com. We will not know what page you are responding to. Sound, even noise outside of human perception, can interfere with the sonic pulses. Copyright Cahaba Media Group, Inc. All Rights Reserved. Very few manufacturers employee ultrasonic technologies that can measure less than 5-10%, while only one manufacturer, Smartmeasurement Inc. from USAhas a patented technique that can measure accurately fluid flow of up to 30% bubbles/solids in stream Transit time ultrasonic flow meters are used in the vast majority of flow application due to its superior technology in obtaining excellent accuracy versus Doppler technology as well as its ability to measure liquids with up to 30% solids and bubbles in the flow stream. Low Cost Ownership Thus, it is very essential to know its advantages/disadvantages. # Used only in clean gas, or fluid applications. Your email address will not be published. Steam users also desire a relatively high turndown or flow measurement range to understand energy usage during peak and low demand needs. In addition to a high turndown, ultrasonic meters provide no pressure drop. The Elster-Instromet Q.Sonic-plus ultrasonic meter works well for custody transfer of natural gas, as well as other applications in gas exploration, transmission, and distribution. The difference between upstream and downstream traveling times, t, is directly proportional to the flow velocity as seen in Equation 1. Ultrasonic flow meters are the equipment of choice whenever the contact with the measured fluid isnt possible. 2,3,4 Wire Resistance Temperature Detectors, Static and Dynamic Characteristics of Instruments, Closed-loop control Feedback, Feedforward, Cascade, Split Range, and Ratio control, Open-loop and closed-loop control systems, Instrumentation Interview question and answers. Compact ultrasonic transducers are either installed in a flow cell (spool piece) or directly in the steam pipe, one upstream of the other with mounting nozzles. In 1990 she founded Linc Energy Systems, where she remains as President and CEO. Ultrasonic clamp on flow meters readings are altered by acoustic properties of fluids and impacted by density, viscosity, temperature and suspended particulates, all dependent on the type of flow meter. Finally, the AlsonicDSP ultrasonic product line flow meters can be used to measure fluids that contain up to 30 percent gas bubbles or solids. Excessive particles or bubbles in the flow stream up to 40% or more. Types of Cable trays, and it's selection. In most situations, the exterior installation works very well. Meanwhile, even though it requires maintenance, the flow wont be stopped and production can continue. Ingress Protection (IP) and its NEMA equivalent ratings. Digital signal processing alleviates many of the problems caused by noisy environments. This article is a continuing series on types of gas flow meters. This increases the accuracy of the flow rate measurement. The Doppler flowmeter works based on the principle of Dopplers effect, which says that the frequency of the sound waves shifts when reflected by a moving object. It is perfect when an application cannot be shut down or a pipe cannot be cut during installation. However, in case of uneven wall thickness or corrosion problems, the transducers have to be inserted through the pipe, in order to be able to do their job properly. ), Can respond well to rapid changes in flow, Applicable to liquids with heavy particulates, Available in a wide variety of communication protocols, Ability to register locally, remotely or to interface with an energy management system. What is SCADA system (Supervisory, Control And Data Acquisition), Difference between Analog and Digital Transmitter. The transducer emits a sonic beam into the process and entrained particles or bubbles reflect the beam back to the transducer.
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