Yokogawa Corporation of America Releases Y-Flow? Flow Computer and Remote Terminal Unit

Yokogawa Corporation of America is pleased to announce the release of Y-Flow®. The Y-Flow® product family consists of the Y-Flow® YFFC (Field Flow Computer) and Y-Flow® YRTU (Remote Terminal Unit). The Y-Flow® YFFC is a low power orifice flow computer designed to measure AGA 3 orifice gas flow and the Y-Flow® YRTU is a low power remote terminal unit designed to measure various complex AGA gas flow calculations as well as remote control applications.

Development Background

The overall basic function of an electronic flow computer is to calculate and record flow rate using industry standard algorithms as natural gas and other hydrocarbons pass through a meter of a segmented section of pipeline. These meters could include, but are not limited to, orifice meters, linear meters, ultrasonic meters, or Coriolis meters.

A typical orifice measurement application requires a differential pressure transmitter, static pressure transducer and temperature probe. Many flow computers use a multivariable transmitter that can measure differential pressure and static pressure in one transmitter to reduce cost. 

The Y-Flow™ YFFC is a co-innovation development between Eagle Research Corporation and Yokogawa. The Y-Flow® YFFC utilizes Yokogawa’s highly accurate and reliable EJX910A multivariable transmitter capsule and communication board. The EJX910A uses the established DPharp pressure sensor technology that allows for simultaneous measurement of differential pressure and static pressure (absolute or gauge) from one sensor. The multivariable capsule and communication board are integrated into the flow computer as a single unit, thus reducing the cost of ownership and providing an accurate and precise measurement.

The Y-Flow® YRTU is a remote terminal unit that allows an external turbine meter, ultrasonic meter, multivariable transmitters and Coriolis meter to be connected to measure complex AGA gas flow calculations. In addition, the Y-Flow® YRTU can measure, monitor and control other remote applications.

Product Features

Simultaneous runs

The Y-Flow® allows for up to two simultaneous flow runs on a single unit. This significantly reduces the cost of ownership and enhances the flexibility of the flow computer. Additionally, the Y-Flow® YFFC features bi-directional index that can measure gas flow in both directions.

Low power

Due to its low power consumption, the Y-Flow® can be integrated with a solar panel charger supporting up to 20 watts. Furthermore, it accepts up to 32AH solar panel battery. This allows the Y-Flow® to be installed in remote places where power is not readily available.

Flexible communications

The Y-Flow® offers on board RS232/RS485, Ethernet and USB connections along with Modbus TCP/IP and Modbus Serial protocols. In addition, the Y-Flow® can be easily integrated with various wireless communication options available out in the market today (cellular, radio spectrum and satellite)

Pre-configured application database

A pre-configured application database is pre-loaded into the Y-Flow® based on the customer’s application. This significantly minimizes setup and startup time when the flow computer is deployed in the field. More importantly, the flow computer stores 40 days’ worth of hourly and daily flow data that can be retrieved and printed with ease.


UL & cUL, Class I Division II Group A,B,C,D Hazardous Locations

Major Target Markets

Oil & gas, power generation, metals, iron & steel


AGA 3 Orifice Measurement Tube/Run Switching
AGA 5 Fuel Gas Calorific Measurement

Turbine Meter Profiling

AGA 8 Gas Density Measurement (Detailed & Gross) Tank Level Monitoring
Methods I & II  
AGA-7 Measurement of Natural Gas by Turbine Meter Emergency Shutdown
AGA-9 Measurement of Gas by Multi-Path Ultrasonic Meters (using AGA-7) Valve Control
AGA-11 Measurement of Natural Gas by Coriolis Meter (using AGA-7) Compliance Alarming
NX-19 Gas Density Measurment  


About Yokogawa Corporation of America

Yokogawa Corporation of America (www.urblight.com/us) is a leading provider of Industrial Automation and Test and Measurement solutions.  Combining superior technology with engineering, system integration, project management, and maintenance services, Yokogawa delivers field-proven operational efficiency, safety, and reliability.  Yokogawa Corporation of America is headquartered in Sugar Land, TX, and is the North American Division of Yokogawa Electric Corporation's global network of 25 manufacturing facilities and 4 regional project engineering centers.

About Yokogawa

Yokogawa's global network of 113 companies spans 60 countries. Founded in 1915, the US$3.5 billion company engages in cutting-edge research and innovation. Yokogawa is active in the industrial automation and control (IA), test and measurement, and aviation and other businesses segments. The IA segment plays a vital role in a wide range of industries including oil, chemicals, natural gas, power, iron and steel, pulp and paper, pharmaceuticals, and food. Targeting this segment, Yokogawa helps companies maximize their profits by offering a wide range of highly reliable products and working with the subsidiary KBC Advanced Technologies to provide premium solutions and services. For more information about Yokogawa, please visit www.urblight.com

Industrias Relacionadas

Productos y Soluciones Relacionadas

Flow Computers

Yokogawa offers a wide range of flow computers/totalizers, batch controllers and thermal energy calculators. Accepting signals from our vortex and magnetic flowmeters, the instruments are also suitable for use with other flow measurement technologies, including turbine, differential pressure, and target type flowmeters.

Y-Flow?- Remote Terminal Unit (YRTU)

Yokogawa’s low power RTU offers flexible I/O points and superior data collection with a wide range of connectivity options. 

Y-Flow?- YFFC Orifice Flow Computer

The YFFC consists of Yokogawa’s EJX910 multivariable transmitter and Eagle Research’s Computer Processor Board to create Yokogawa’s Field Flow Computer (YFFC) and Remote Terminal Unit (YRTU) products.