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Private company

Fluid Components International

Logo: Fluid Components International, CC BY-SA 3.0, via Wikimedia Commons3

American manufacturing company founded in 19641

Fluid Components International (FCI), headquartered in San Marcos, California. In November 2023, FCI was acquired by Process Sensing Technologies (PST). FCI is a manufacturer of thermal dispersion technology flow and level measurement instrumentation.2 Wikipedia text CC BY-SA 4.0

Last updated Oct 21, 2026.

Overview

1964Founded1

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FCI-OCSD
Photo: IKnowFlow, CC BY-SA 3.0, via Wikimedia Commons5

Fluid Components International (FCI), headquartered in San Marcos, California. In November 2023, FCI was acquired by Process Sensing Technologies (PST). FCI is a manufacturer of thermal dispersion technology flow and level measurement instrumentation. FCI has three business units: One serving customers with measurement needs in industrial process and plant applications; An aerospace division which design and manufactures level, flow, temperature, and pressure sensors for onboard both fixed wing and rotary aircraft; and FCI-Nuclear which manufactures level and flow measurement instruments for the unique and specific applications in nuclear power plants. FCI was a pioneer in developing thermal dispersion technology and holds numerous design and technology patents for its application in flow and level measurement.2

The story

FCI was founded in 1964 in Canoga Park, California by Robert (Bob) Deane and Malcom (Mac) McQueen.

In 1978, FCI began its nuclear division to deliver level, flow, and temperature measurement solutions to the nuclear power industry. These products have the certifications and credentials that comply with global standards for nuclear plant installations.

In 1980, FCI relocated its corporate and manufacturing headquarters to San Marcos, California (near San Diego). In order to support FCI's increasing international customer base, the company opened the European Sales and Service Center in the Netherlands in 1993.

In 2001, FCI received AS 9100 certification. FCI's design, manufacturing and calibration systems, processes, and facilities are continuously reviewed and audited.

In 2010, Control Global Magazine Reader Choice awards for Thermal Flowmeters and Flow Switches were awarded to FCI.

in 2023, acquired by Process Sensing Technologies (PST)

From Wikipedia’s article on Fluid Components International, shared under CC BY-SA 4.0.4

Timeline

  1. 1964Founded Founded1

Funding

Where the company's money came from, by calendar year: private offerings filed with the SEC, federal grants, loans, contracts and other assistance from USAspending.gov, and PPP loans from the SBA. Each bar links to the records below.

Money received by year$3.6M 2020–2020
Money received by yearMoney received by year, 2020–2020: $3.6M in all. PPP loans $3.6M.$0$1M$2M$3M$4M2020 · PPP loans: $3.6M2020
Figures by year
YearPPP loansTotal
2020$3.6M$3.6M

PPP loans

Paycheck Protection Program loans of $150,000 and up, approved April 2020 to July 2021, from the SBA6. Matched to this company by name and state.

  1. Apr 5, 2020$3.6M PPP loan (first draw) from City National Bank6To FLUID COMPONENTS INTERNATIONAL LLC, San Marcos CA; $3.6M forgiven Jul 22, 2021

Sources

The numbers on this page point here. Each one links to the record it came from.

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