New ultrasonic flowmeter family for process applications

Clark Solutions sensor family uses spool-section configuration for permanent mounting.

03/12/2010


Clark Flowmeter

Clark Sonic flow transmitter

 

Clark Solutions has released its new line of CSLFC ultrasonic flow transmitters aimed at permanent mounting applications in process systems. Clark says these transmitters are easy to install, do not impact the flow, pressure, or transit times of fluids, and are unaffected by fluid temperatures or viscosities, making them suitable for measuring flow ranges from 4.5 to 3,000 gpm in 4 to 10 in. pipe.

The company describes this product family as featuring no moving parts, with excellent long-term stability, no pressure drop, and high accuracy at a lower cost than similar instruments. Each sensor is built into a section of schedule 40 epoxy coated carbon steel pipe with Ultem encapsulated ultrasonic transducers and a choice of EPDM, Buna-N, Neoprene, FKM, or other seals. Device transmitters provide a continuous 4-20 mA flow signal. Optional configurations include direction of flow capability, NEMA 4 and 8 pin connector receptacles for simplified installation, and a DP/DS panel meter display.

Clark says its transmitter uses a proprietary mixed signal ASIC (application specific IC), which allows sophisticated timing, control, and transducer drive circuitry to be combined on a single chip. The ASIC uses a special algorithm that is an improvement upon standard single-path measurement techniques. The transmitters use the sing-around method, where each transducer alternates between transmitting and receiving, to measure differences in flight time between upstream and downstream transmissions. The flight time of the sound pulse from the transmitting transducer to the receiving transducer will be shortened if the pulse is launched in the direction of flow, and increased if launched opposite to the direction of flow. By alternating the transmitting and receiving transducers, the difference in these transit times can be used to calculate the velocity of the flow, which, when multiplied by the area of the pipe, results in a measure of volumetric flow rate. The primary advantage of this method is that the velocity of the fluid is being measured independent of the relative speed of sound in that given fluid. The measurement is also unaffected by changes in water temperature, density, and viscosity.

Read a tutorial on ultrasonic flowmeter technology.

-Edited by Peter Welander, process industries editor, peter.welander@cfemedia.com
Control Engineering Process Instrumentation & Sensors Monthly eNewsletter
Register here to select your choice of free eNewsletters .



No comments
The Engineers' Choice Awards highlight some of the best new control, instrumentation and automation products as chosen by...
Each year, a panel of Control Engineering editors and industry expert judges select the System Integrator of the Year Award winners.
Control Engineering Leaders Under 40 identifies and gives recognition to young engineers who...
Learn more about methods used to ensure that the integration between the safety system and the process control...
Adding industrial toughness and reliability to Ethernet eGuide
Technological advances like multiple-in-multiple-out (MIMO) transmitting and receiving
Big plans for small nuclear reactors: Simpler, safer control designs; Smarter manufacturing; Industrial cloud; Mobile HMI; Controls convergence
Virtualization advice: 4 ways splitting servers can help manufacturing; Efficient motion controls; Fill the brain drain; Learn from the HART Plant of the Year
Two sides to process safety: Combining human and technical factors in your program; Preparing HMI graphics for migrations; Mechatronics and safety; Engineers' Choice Awards
The Ask Control Engineering blog covers all aspects of automation, including motors, drives, sensors, motion control, machine control, and embedded systems.
Join this ongoing discussion of machine guarding topics, including solutions assessments, regulatory compliance, gap analysis...
News and comments from Control Engineering process industries editor, Peter Welander.
IMS Research, recently acquired by IHS Inc., is a leading independent supplier of market research and consultancy to the global electronics industry.
This is a blog from the trenches – written by engineers who are implementing and upgrading control systems every day across every industry.
Anthony Baker is a fictitious aggregation of experts from Callisto Integration, providing manufacturing consulting and systems integration.
Integrator Guide

Integrator Guide

Search the online Automation Integrator Guide
 

Create New Listing

Visit the System Integrators page to view past winners of Control Engineering's System Integrator of the Year Award and learn how to enter the competition. You will also find more information on system integrators and Control System Integrators Association.

Case Study Database

Case Study Database

Get more exposure for your case study by uploading it to the Control Engineering case study database, where end-users can identify relevant solutions and explore what the experts are doing to effectively implement a variety of technology and productivity related projects.

These case studies provide examples of how knowledgeable solution providers have used technology, processes and people to create effective and successful implementations in real-world situations. Case studies can be completed by filling out a simple online form where you can outline the project title, abstract, and full story in 1500 words or less; upload photos, videos and a logo.

Click here to visit the Case Study Database and upload your case study.