New Coriolis flowmeter presses lower limits

Yokogawa introduces low-capacity dual bent-tube Coriolis meter.

11/14/2012


The new ROTAMASS Coriolis flowmeter from Yokogawa.Yokogawa Electric Corporation has released its new RotaMass LR, which it characterizes as the the world’s smallest dual bent-tube Coriolis mass flowmeter. Designed to measure both liquids and gasses, the mass flow measurement spans from 0-40 kg/h, which corresponds to about 0-10.5 gph of water. The accuracy is ±0.15% for liquids and ±0.5% for gasses. The RotaMass LR aims at demand for accurate and stable measurement of fluids at low flow rates. Yokogawa has developed the low-flow Coriolis meter based on its proven dual bent tube design to overcome the current shortcomings of single-tube low-capacity flowmeters. These shortcomings include susceptibility to external vibrations and changes in ambient or process fluid temperatures which lead to less accurate and stable measurements in real-world conditions.

The dual bent-tube design decouples the core measuring element from process vibration that can cause fluctuating zero stability and decreased measurement accuracy. When fluid density changes, a single-tube Coriolis flowmeter can become imbalanced and start to behave like an emitter. This design remains balanced due to the equal mass change in both tubes and the absence of interference from the process piping. By design, it is insensitive to fluctuations in the ambient temperature and achieves excellent zero stability under changing process conditions. The two tubes are made from C-22 alloy, which is less susceptible to thermal expansion than conventional stainless steel.

The tube temperature measurement plays a key role in mass flow and density measurements. Normally, it is more difficult to measure temperature with Coriolis flowmeters that have tubes with a smaller surface area. This design solves that problem by using an inline temperature sensor, ensuring exact and fast measurements in process temperatures ranging from -50 to 150 °C.

Safety is a major concern with this design with a gas-tight, all-stainless-steel secondary containment that can handle pressures up to 65 bar. The meter itself can be used in high pressure applications up to 400 bar. A huge variety of welded process connections are available and no gaskets are used, minimizing the risk of leaks. Where fluid component separation and gas condensation are a concern, insulation and a heat jacket are available as an option.

Takashi Nishijima, a director and senior vice president, and head of the industrial automation platform business headquarters for Yokogawa says, "By measuring and controlling very low flow rates with a high level of precision, Yokogawa is helping its customers realize the VigilantPlant concept. We believe that this newly developed product gives customers a wider range of choices in multi variable process measurement and allows for greater accuracy and steady measurement in their utilization."

www.yokogawa.com

Edited by Peter Welander, pwelander@cfemedia.com



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
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
Detecting security breaches: Forensic invenstigations depend on knowing your networks inside and out; Wireless workers; Opening robotic control; Product exclusive: Robust encoders
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.