ISO/IEC 17025 Accredited Flow Calibration

Accurate flow measurement is essential to safe, efficient, and compliant operations. Our national network of local calibration providers delivers the precision your processes rely on, supporting product quality, protecting resources, and minimizing costly disruptions.

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Our Flow Calibration Services

Precise flow measurement is critical across industries such as chemical processing, water and wastewater treatment, pharmaceuticals, food and beverage production, and energy generation.

When flow instruments drift out of specification, the effects can be far-reaching, from process inefficiencies and product quality problems to environmental compliance risks and unnecessary financial loss. The Accredited Labs network offers complete flow calibration services to keep your instruments performing within their required accuracy ranges.

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Our Process 

Flow calibration involves verifying and adjusting instruments that measure the rate of fluid movement through pipes, channels, or other controlled pathways. Each instrument is compared to certified reference standards with known, traceable flow rates to identify any deviations from its intended performance.

Experienced technicians assess each device across its full operating range under precisely controlled flow conditions, document all variations, and may make the adjustments needed to restore accuracy. If an instrument cannot be restored to the required accuracy range, you receive detailed reporting with the data necessary for maintenance planning, corrective action, or replacement decisions.

All flow calibrations follow internationally recognized protocols that promote consistency, reliability, and full measurement traceability. Every instrument is returned with documentation linking its accuracy to national flow measurement standards—supporting quality management systems, regulatory requirements, and continuous process control.

Types of Flow Measuring Instruments We Calibrate

Our comprehensive flow calibration services cover the complete spectrum of flow measuring technologies used across industries:

  • Magnetic Flow Meters: These versatile instruments measure conductive fluid flow using electromagnetic principles. They require calibration of both the flow sensor and signal processing electronics to ensure accurate measurement across varying fluid conditions and flow rates.
  • Turbine and Positive Displacement Meters: Mechanical flow meters measure flow through rotating elements that require calibration to account for wear, viscosity effects, and mechanical tolerances that affect measurement accuracy over time.
  • Ultrasonic Flow Meters: These non-invasive instruments use acoustic signals to measure flow and require calibration of timing circuits, signal processing algorithms, and transducer characteristics to maintain measurement accuracy across different fluid types and pipe conditions.
  • Vortex Flow Meters: These instruments measure flow by detecting vortices created by flow obstructions. Calibration ensures accurate vortex detection and frequency measurement across the instrument's flow range and various process conditions.
  • Differential Pressure Flow Meters: Including orifice plates, venturi tubes, and flow nozzles, these instruments calculate flow from pressure differences. Calibration verifies both the pressure measurement accuracy and flow calculation algorithms.
  • Thermal Mass Flow Meters: These instruments measure flow by detecting heat transfer effects in flowing fluids. Calibration ensures accurate temperature measurement, heating element control, and flow calculation across different gas compositions and process conditions.
  • Coriolis Mass Flow Meters: These precision instruments measure mass flow directly through Coriolis force effects. Calibration involves verification of frequency measurement, phase detection, and mass flow calculations across varying fluid densities and viscosities.
  • Variable Area Flow Meters: Including rotameters and other variable area devices, these instruments require calibration to ensure accurate flow indication across their measurement range and various fluid conditions.
  • Open Channel Flow Measurement: Weirs, flumes, and other open channel flow measurement devices require calibration of level measurement systems and flow calculation algorithms to ensure accurate flow determination.

Find Flow Calibration Services

Showing 26 companies
Calibration Types 0
Onsite Service Locations 0
  • Accutek Lab

    Accutek Lab has been providing reliable and cost-effective pipette calibration services across the United States since 1996.

  • Aldinger

    Since 1972, Aldinger has been providing top-quality calibration services for test and measurement equipment in Texas and beyond.

  • Cal-Cert

    Cal-Cert is committed to providing the highest level of calibrations and certification service to our customers.

  • Cal-Labs

    Cal-Labs has provided quality calibration in Southern California since 1977. We are A2LA accredited to ISO 17025. 

  • Calibration Services Inc.

    Calibration Services, Inc. (CSI) is an on-site and in-house calibration firm specializing in calibration and service of mechanical testing devices.

  • Cal Tec Process Management

    The calibration specialists at CTPM have been providing precision calibration and quality assurance since 1987.

  • Calser Calibrations

    Since 1979, Calser Calibrations has delivered trusted, precision calibration services backed by a commitment to quality and reliability.

  • CMG Sales, Inc.

    CMG Sales, Inc. is a leading manufacturer sales representative and ISO 17025 accredited calibration laboratory providing services to manufacturers nationwide.

  • Color Calibration Group

    Color Calibration Group has been providing professional calibration services for all your color, light, and viscosity calibration needs for over 25 years.

  • ETI Precision

    ETI has been a leader in the calibration, repair, and sale of test and measurement equipment since 1994, and covers all 50 states.

  • Holts Precision, Inc.

    For over 60 years Holts Precision, Inc. has performed calibrations & repairs on all major brands of gaging equipment.

  • Huston-DePue

    Established in 1960, HDCL is staffed by experienced professionals who understand the critical role accurate measurement plays in quality control and regulatory compliance.

  • Instrument Technologies, Inc.

    For over three decades, Instrument Technologies, Inc. (ITI) has been a trusted partner for regulated industries seeking precision, compliance, and operational reliability.

  • IPM, Inc.

    Industrial Process Measurement, Inc. has been in the instrument supply, service and calibration business for over 30 years.

  • J & J Calibration Service

    J&J Calibration Service, an ISO-17025 accredited company, offers unmatched mobile calibration capabilities and laboratory calibration services.

  • OCS Technologies

    Founded in 1930, OCS Technologies is a trusted multi-discipline calibration service provider as well as leading product distributor.

  • OnCal

    With over 23 years of experience in pipette calibration in the Pacific Northwest, the OnCal Corporation guarantees seamless and dependable metrology services.

  • Precision Calibration Systems

    PCS is a full-service ISO 17025 Accredited calibration laboratory, founded with the goal of providing reliable and accurate instrument calibration service.

  • Quality Control Services

    Quality Control Services is an established, accredited calibration services and laboratory equipment company with over 40 years of experience.

  • Quality Surveillance, Inc.

    QSI has been providing Los Angeles, Ventura, Santa Barbara and Santa Clarita Counties with reliable and cost effective metrology services since 1992.

  • Servo Innovations

    Servo Innovations, founded in 2005,  has earned industry-wide trust for its accredited calibration, repair, and technical services.

  • Tescom Calibration Services

    Tescom Calibration Services has provided sales, repair, and calibration of telecom test equipment since 1982.

  • Trident Calibration Labs

    Serving the greater Phoenix area, Trident Calibration Labs has more than 100 years of combined calibration experience.

  • Tru Cal International

    Serving as an asset to countless businesses in a variety of industries, Tru Cal International has specialized in test equipment calibration since 1992. 

  • Utah Scale Center

    Utah Scale Center offers servicing and calibrating of industrial scales across the Rocky Mountain Region, with 70+ years of experience.

  • Washington Calibration

    Washington Calibration has been providing customers with quality gage repair services for all their inspection measuring instruments for more than 34 years. 

Audit-Ready Calibration in 3 Simple Steps

1

Submit Your Equipment List

Send us a list of the equipment you need calibrated, and we’ll provide a tailored quote with clear pricing—no hidden fees.

2

Schedule Your Calibration

Choose a convenient time for a mobile or on-site equipment calibration. Our certified technicians ensure precision and compliance with ISO/IEC 17025 standards.

3

Stay Compliant & Audit-Ready

Receive detailed calibration reports and certification, giving you peace of mind for audits and operational excellence.

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Comprehensive Services

We offer a wide range of calibration services, covering various equipment 
and instruments.

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Industry Expertise

Our team has extensive experience 
across multiple industries, ensuring 
top-notch service.

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Nationwide Network

With locations across the country, 
we provide reliable services wherever 
you are.