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Invensys Operations Management News
| Foxboro Introduces Multivariable Transmitter That Provides Accurate Tank Level Measurement |
New IMV31 density-compensated level transmitter available with HART Communications HOUSTON, TEXAS, USA (ISA 2004 Exhibition) – October 5, 2004 – The Foxboro Measurements and Instruments Division of Invensys Process Systems has introduced a level transmitter that delivers accurate measurement in either open or closed tanks. Based on hydrostatic measurement and advanced multivariable sensing technology, the IMV31 Density-Compensated Level Transmitter uses differential pressure, pressure, and temperature measurements to compensate for liquid and vapor density changes. It transmits a 4 to 20 mA output signal proportional to level and provides HART® digital communications. “Users like the simplicity, reliability, and low cost of DP transmitters for tank level applications. However, until now, they had no easy, cost-effective way to compensate the output for fluid density changes that would otherwise cause errors in the level measurement. We solved that problem by adding on-board level calculations to our multivariable transmitter. Our IMV31 continuously calculates density based on measurements of pressure and temperature, and uses this information along with its differential pressure measurement to calculate tank level,” said Ken Brown, vice president and general manager of Foxboro Measurements and Instruments. The IMV31 is suitable for both open (vented) and closed (pressurized) tanks and compensates for density changes in the tank liquid and vapor and density changes in both vapor and liquid in external dry or wet legs. This makes the transmitter ideally suited for critical applications such as boiler drum level and for other high performance applications where fluid densities are significantly affected by variations in pressure and temperature. By consolidating multiple measurements in a single device, the IMV31 minimizes the number of transmitters required, which enhances reliability while reducing wiring, installation, and inventory costs. The IMV31 Density-Compensated Level Transmitter is available for immediate shipping. A configurator software package for Foxboro multivariable transmitters, Model PCMV, has been enhanced to Version 3.0 to allow easy setup and commissioning of the IMV31 transmitter. The configurator includes an extensive fluid properties table and also allows user-entry of custom liquid parameters. For more information on the IMV31, PCMV, or other Foxboro measurement and instrument devices, readers can contact their local Foxboro representative, visit the Foxboro Measurements and Instruments Web Site at www.foxboro.com/instrumentation or call (866) 746-6477. About Foxboro M&I Division The Foxboro Measurements and Instruments (M&I) Division has a long-standing reputation for providing world-class, measurement solutions. With a legacy of accurate, reliable and innovative products, the company prides itself on working with customers to achieve industry-best total solutions for optimum measurement or analysis of temperature, pressure, flow, and electrochemical variables. About Invensys Process Systems Process Systems, a business unit of Invensys plc, provides products, services and solutions for the automation and optimization of industrial process plants. Invensys Process Systems includes industry-leading brands such as Foxboro, Triconex, SimSci-Esscor, Wonderware, and Avantis, whose products are installed in more than 100,000 plants across the world. These range from small hybrid and batch plants to the world’s largest refineries, gas plants, petrochemicals plants, power plants, pulp and paper mills, and mineral processing plants. The Invensys Group (www.invensys.com) is headquartered in the UK and listed on the London Stock Exchange. With 35,000 employees operating in 60 countries, Invensys helps customers to improve their performance and profitability, building value for end users and shareholders alike. |