Your Needs, Our Solutions

FCI is a world-leading manufacturer of mass flow meters, flow switches and level switches for use in industrial and commercial applications. Rugged designs and packaging with International approvals for hazardous location installations, FCI products are used in industry's most demanding applications.

Protect Your Pump And Keep It Longer   Measuring Methane-Based Digester Gas Flow In Wastewater Treatment Plants   Air / Gas Mass Flow Meter Improves Wastewater Treatment Processing Efficiency
Protect Your Pump And Keep It Longer   Measuring Methane-Based Digester Gas Flow In Wastewater Treatment Plants   Air / Gas Mass Flow Meter Improves Wastewater Treatment Processing Efficiency


The ST50 Flow Meter is an accurate, easy to install, non moving parts flow meter solution for measuring and controlling air, compressed air and nitrogen flow

ST100 is an all-new, thermal dispersion technology gas flow meter that combines the most feature- and function- rich electronics with the industry's most advanced flow sensors to achieve a truly state-of-the-science flow metering solution for industrial processes and plant applications.

The FS10A is a universal flow switch and monitor specifically designed for gas and liquid process analyzer sampling systems.

The FLT93S insertion type FlexSwitch for flow and temperature monitoring represents the first true technological breakthrough in thermal technology in over a decade

Plant engineers responsible for improving digester processes or utilizing the biogas as a fuel source will find the new Model ST51 Mass Flow Meter from Fluid Components International is designed as an application-specific solution to meet their unique needs.

ST80 is a high performance, rugged thermal dispersion technology air/gas flow meter that combines ultra-reliable, feature-rich electronics with the industry's most extensive selection of application-matched flow sensors to provide a truly superior solution for industrial processes and plant applications. The ST80 further combines these features with a robust, rugged transmitter enclosure and industry’s broadest selection of process connections to provide longest service life and ease-of-installation in your installation’s pipe or duct.



Fluid Components International

1755 La Costa Meadows Drive

San Marcos, CA 92078


Phone: 760-744-6950

Fax: 760-736-6250

Contact: Applications Team: appengrs@fluidcomponents.com


  • Thermal Flow Meters Optimize Waste-To-Energy Plant Boiler Intake Air Flow And Flue Gas Measurement

    Engineers challenged with designing or operating waste-to-energy incineration plants will find the ST80, ST100 and MT100 Thermal Mass Flow Meters from Fluid Components International (FCI) offer them accuracy, repeatability, ease of installation and low maintenance to enhance plant performance while driving costs down.

  • Best Practices: Safety And Certainty With Actual Gas Calibration Of Thermal Mass Flow Meters

    Flow meter calibration should never be taken for granted, and thermal mass flow meters are no exception. Flow meters can be built with the highest safety ratings, features and functions, and the most industrially robust sensor technology, but if the calibration is inaccurate or subject to uncertainty due to an equivalency-based calibration or simulation methods rather than an "actual" fluid calibration, then the device could produce unsatisfactory performance issues.

  • Thermal Flow Meter Improves Digester Gas System Fueling Boilers For Plant Steam And Hot Water

    Accurate, repeatable air/gas flow measurement under harsh outdoor conditions is essential to successful wastewater treatment operations when used in aeration or digester biogas applications. The challenge for plant engineers when it comes to measuring reactor air and digester gas flow is that a relatively small number of flow meter technologies are capable of reliable measurement under the variable climate and dirty operating environments encountered at wastewater treatment plants.

  • Multipoint Thermal Mass Flow Meters Improve Boiler Air Preheater (APH) System Efficiency

    Engineers who need to optimize boiler efficiency for electric power generation will find the MT100 and ST102A Multipoint Thermal Mass Flow Meters from Fluid Components International (FCI) help them accurately measure recycled hot air from stack gases in order to reduce the consumption and cost of fuel.

  • Air/Gas Flow Measurement For Turbomachinery: What You Don’t Know Can Be Frustrating

    The accurate, repeatable flow measurement of air and gases is critical to the safe, efficient and cost-effective operation of turbomachinery and related equipment in the electric power generation, oil/gas production/refining and other industries. Choosing the wrong air/gas flow meter sensing technology can have significant consequences.

  • Reliable Thermal Switch Ensures Safe Operation Of Loading Arms At Marine Terminal To Prevent Spills

    A leading European-based marine terminal operator with locations on every major continent is responsible for the managing, handling, storing and distribution of large quantities of oil and gas, as well as refined petrochemicals, which serve industries and consumers around the globe. The company’s thousands of employees are highly trained and are focused on the safe, reliable and efficient storage of large quantities of bulk products at each of its locations.

  • How To Comply With NFPA Code 30 Requirements For Level And Flow Detection

    National Fire Protection Association (NFPA)® Code 30 defines safeguards to reduce the hazards associated with the storage, handling, and use of flammable and combustible liquids. In the USA, NFPA codes are recognized and enforceable under OSHA and many state and local regulations.

  • Aeration Air Flow On PROFIBUS Communications-Based DCS In Wastewater Treatment Plant

    A major municipal wastewater treatment plant in Scandinavia was incrementally upgrading and converting the plant’s control system from a traditional analog-based system (e.g. 4-20 mA) to PROFIBUS-based digital bus communications. The plant was very successful using, and has installed, FCI constant power technology thermal flow meters, Models AF88 and ST98, in the aeration lines for many years. Can FCI help them convert and upgrade the aeration flow control to PROFIBUS utilizing the same constant power technology thermal flow meters?

  • Chlorine Gas Flow Meter In Chlorinator System

    Chlorinators are a frequently used system for water disinfection in municipal and industrial water treatment processes.  

  • Optimizing Wastewater Treatment Plant Aeration System Air Flow Measurement

    The air flow into the aeration basins at a major wastewater treatment plant (WWTP) located in Northeastern USA were continuously running at maximum flow resulting in significant, and excessive, energy cost and excess wear and tear on the aeration blowers.


FCI gas mass flow meters are used in pipe diameters from 1/4 inch [6 mm] to over 99 inches [2500 mm]. From small dosing lines, to fuel gas feed lines, to mid-size aeration lines to large stacks and flare gases, FCI mass flow meters, flow switches and level switches are installed and working with superior accuracy and reliability day-in and day-out. FCI product technologies include thermal dispersion and Coriolis.

FCI products deliver accuracy and reliability to the world's most demanding processes and industries including chemical, oil and gas, power and energy, water and wastewater, pharmaceutical, pulp and paper, nuclear power, aerospace, and many more.

Where product pedigree and instrument reliability cannot be left to chance, FCI offers the most reliable selection of non-moving part sensing solutions from off-the-shelf devices to custom engineered systems.

Complimenting FCI product leadership is a world class Flow and Level Calibration Facility in which all calibrations are performed in liquids or gases utilizing only N.I.S.T. traceable equipment and instrumentation. We are proud of our quality systems that meet the requirements of MIL-STD-45662A, ANSI/NCSL Z-540 and ISO EN17025.

Worldwide Sales and Customer Service

  • FCI products are represented worldwide.
  • FCI Service Centers are located to serve all continents.
  • 24-hour access to Customer Service and Technical Field Support.