ISO/IEC 17025 Accredited Pressure Calibration

Accurate pressure measurement is essential to safe, efficient, and reliable operations. Our national network of local calibration experts delivers the precision you require, from supporting process control to protecting equipment and reducing costly operational risks.

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Our Pressure Calibration Services

Pressure instruments support critical applications across chemical processing, power generation, HVAC, hydraulics, manufacturing, medical devices, and more.

When they drift out of specification, the results can be serious—process instability, safety hazards, equipment failures, and production downtime. The Accredited Labs network provides comprehensive pressure calibration services that keep your instruments performing within their required accuracy ranges.

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Our Process 

Pressure calibration involves verifying and adjusting instruments that measure gauge, absolute, differential, and vacuum pressure across defined operating ranges. Each device is compared to certified reference pressure standards with known, traceable values to identify any deviations from its intended performance.

Experienced technicians test instruments using precisely controlled pressure sources throughout the full measurement range, document all variations, and may make the adjustments required to restore accuracy. If an instrument cannot be restored to the required accuracy range, you receive detailed reporting with the data needed for corrective action, maintenance planning, or replacement decisions.

All pressure calibrations follow internationally recognized standards that support consistency, reliability, and complete measurement traceability. Each instrument is returned with documentation linking its accuracy to national pressure measurement standards—meeting the needs of quality management systems, safety regulations, and process control requirements.

Types of Pressure Measuring Instruments We Calibrate

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

  • Digital Pressure Gauges: Electronic instruments that provide precise digital pressure readings with data logging and communication capabilities. These instruments require calibration of pressure sensors, signal processing electronics, and display systems to ensure accurate measurements across their full range.
  • Analog Pressure Gauges: Traditional mechanical gauges including Bourdon tube, diaphragm, and bellows-type instruments. Calibration ensures accurate pointer indication, scale linearity, and mechanical stability across the measurement range and various environmental conditions.
  • Pressure Transmitters: Industrial instruments that convert pressure measurements into standardized electrical signals for process control systems. Calibration verifies both pressure measurement accuracy and signal output characteristics across the full measurement and output ranges.
  • Differential Pressure Instruments: Specialized instruments that measure pressure differences between two points, commonly used for flow measurement, filter monitoring, and level detection. These instruments require calibration of both pressure inputs and differential measurement accuracy.
  • Absolute Pressure Gauges: Instruments that measure pressure relative to perfect vacuum, used in vacuum applications, barometric measurements, and applications requiring absolute pressure references. Calibration ensures accurate absolute pressure measurement across atmospheric and sub-atmospheric conditions.
  • Vacuum Gauges: Specialized instruments for measuring sub-atmospheric pressures in vacuum systems, processing equipment, and scientific applications. These instruments require specialized calibration procedures and vacuum reference standards.
  • Pressure Switches: Devices that provide electrical switching based on pressure setpoints, used for safety systems, process control, and equipment protection. Calibration verifies switching accuracy, repeatability, and deadband characteristics.
  • Pressure Transducers: Sensors that convert pressure measurements into electrical signals for data acquisition and control systems. Calibration ensures accurate pressure-to-signal conversion and long-term stability.
  • Manometers: Liquid column instruments used for precise pressure measurements and as working standards. These instruments require calibration of scale accuracy, liquid properties, and environmental corrections.
  • Pressure Calibrators: Instruments used to calibrate other pressure devices require regular calibration themselves to maintain their accuracy and traceability as reference standards.

Find Pressure Calibration Services

Showing 26 companies
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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.