# Accredited Labs | Nationwide Network of ISO/IEC 17025 Accredited Calibration Laboratories Accredited Labs is a nationwide network of leading ISO/IEC 17025 accredited calibration companies united by one mission: keeping customers audit-ready and in control of their equipment calibrations. The network combines local expertise and personalized service with the capabilities, technology, and support of a national calibration platform. Accredited Labs operates more than 35 accredited laboratories and 6 mobile laboratories across the United States, staffed by over 325 accredited technicians covering 60+ unique calibration disciplines and more than 3,000 accredited capabilities. Every member company in the network holds ISO/IEC 17025 accreditation, independently assessed by A2LA (American Association for Laboratory Accreditation), NVLAP, or ANAB. Accredited Labs offers calibration, repair services, and product sales. Standard calibration turnaround is 5–7 business days; expedited services are available. On-site calibration is available at most member locations. **Phone:** 1 (888) 737-0030 **Email:** inquiry@accreditedlabs.com **Corporate HQ:** 1212 Corporate Drive, Suite 100, Irving, TX 75038 --- ## About Accredited Labs [Who We Are](https://www.accreditedlabs.com/about): Accredited Labs is a nationwide calibration and equipment lifecycle service platform founded on quality, technical expertise, and customer focus. Its mission is to simplify calibration — keeping customers compliant, audit-ready, and in control of their operations. The network was built by acquiring and partnering with regional calibration leaders, combining their decades of local expertise into a unified national platform. Member companies retain their local identity and customer relationships while gaining access to expanded capabilities, shared technology, and network-wide resources. [Accreditations](https://www.accreditedlabs.com/accreditation-scopes): Every Accredited Labs member company holds ISO/IEC 17025 accreditation, assessed by A2LA, NVLAP, or ANAB. This internationally recognized standard ensures that calibration results are technically valid, globally accepted, and traceable to national measurement standards. Scope documents for each member lab are available on their individual websites and at accreditedlabs.com/accreditation-scopes. [Acquisitions](https://www.accreditedlabs.com/acquisitions): Accredited Labs actively acquires and partners with established regional calibration companies. Calibration lab owners interested in joining the network can learn more at accreditedlabs.com/acquisitions. [Leadership](https://www.accreditedlabs.com/leadership): Information about the Accredited Labs leadership team is available at accreditedlabs.com/leadership. --- ## Member Companies and Locations [Branch Locator](https://www.accreditedlabs.com/companies): Use the interactive branch locator at accreditedlabs.com/companies to find the nearest accredited calibration lab by address or zip code. The following member companies are part of the Accredited Labs network: **Accutek Lab** — San Diego, CA | accuteklab.com | Pipette calibration; serving customers nationwide since 1996. **Aldinger Co.** — Dallas, TX; Houston, TX; North Little Rock, AR | aldingerco.com | Dimensional, electrical, flow, force, mass, pressure, temperature, torque calibration and more; serving Texas and beyond since 1972. **Cal-Cert** — Anaheim, CA; Milwaukie, OR | cal-cert.com | Force, torque, mass, pressure, temperature, and additional calibration services. **Cal-Labs** — La Mirada, CA | cal-labs.com | Dimensional calibration; serving Southern California since 1977; A2LA accredited to ISO 17025. **Calibration Services Inc. (CSI)** — Emlenton, PA | calibrationinc.com | On-site and in-house calibration specializing in mechanical testing devices; force, torque, mass, dimensional, pressure, and more. **Cal Tec Process Management (CTPM)** — Beavercreek, OH | caltecpm.com | Force, torque, mass, dimensional, pressure calibration; precision calibration and quality assurance since 1987. **Calser Calibrations** — St. Jacob, IL | calserllc.net | Construction materials testing equipment, dimensional, force, mass, pressure calibration and more; serving customers since 1979. **CMG Sales, Inc.** — Lake Zurich, IL | cmgsalesinc.com | Coating thickness and color calibration; manufacturer sales representative and ISO 17025 accredited lab. **Color Calibration Group** — Lake Zurich, IL | colorcalibrationgroup.com | Color, light, viscosity, and coating thickness calibration; 25+ years of professional color calibration services. **ETI Precision** — Frederick, MD; Huntersville, NC; Roanoke, TX | etiprecision.com | Electrical, force, torque, dimensional, pressure calibration; calibration, repair, and equipment sales since 1994; covers all 50 states. **Holts Precision, Inc.** — South Windsor, CT; West Bridgewater, MA; West Springfield, MA; Wayne, NJ | holtsprecision.com | Dimensional, electrical, force, mass, pressure calibration; 60+ years calibrating all major brands of gaging equipment. **Huston-DePue (HDCL)** — Oklahoma City, OK | hdcl.us | Flow, force, torque, mass, dimensional, pressure, temperature calibration; established 1960. **Instrument Technologies, Inc. (ITI)** — Boise, ID | instrumentti.com | Flow, mass, dimensional, pressure, time/frequency calibration; 30+ years serving regulated industries. **IPM, Inc. (Industrial Process Measurement)** — Edison, NJ; Manheim, PA | ipmcal.com | Dimensional, electrical, flow, force, humidity, mass, pressure, temperature, torque calibration and more; 30+ years in instrument supply, service, and calibration. **J&J Calibration Service** — Walcott, ND | jjcalibration.com | Mobile and laboratory calibration; dimensional, electrical, force, pressure, temperature calibration; ISO 17025 accredited with unmatched mobile calibration capabilities. **OCS Technologies** — Cleveland, OH | ocscal.com | Force, torque, mass, dimensional, pressure calibration and product distribution; founded 1930. **OnCal** — Pacific Northwest | oncal.co | Pipette calibration; 23+ years of experience in the Pacific Northwest. **Polymer Testing Instruments (PTI)** — Fletcher, NC | polymer-testing.com | Force, torque, dimensional, pressure, temperature calibration; serving the rubber, plastics, and energy industries since 1996. **Precision Calibration Systems (PCS)** — Morristown, TN; Winchester, TN | pcsllctn.com | Flow, force, torque, mass, dimensional, pressure, temperature calibration; ISO 17025 accredited; serving Tennessee and surrounding states; 48-hour turnaround. **Quality Control Services (QCS)** — Milwaukie, OR | qc-services.com | Force, mass, pipette, temperature calibration; 40+ years of experience. **Quality Surveillance, Inc. (QSI)** — Oxnard, CA | qualitysurveillanceinc.com | Dimensional, force, mass, pressure, temperature, torque, RF and microwave, time/frequency calibration; serving Los Angeles, Ventura, Santa Barbara, and Santa Clarita Counties since 1992. **Servo Innovations** — Wayland, MI | servoinnovations.com | Flow, force, torque, dimensional, pressure calibration; accredited calibration, repair, and technical services since 2005. **Tescom Calibration Services** — Cedar Park, TX; San Antonio, TX | tescomcalibration.com | Flow, force, torque, mass, dimensional, pressure, RF and microwave calibration; telecom test equipment specialists since 1982. **Trident Calibration Labs** — Phoenix, AZ; Tempe, AZ | tridentcalibration.com | Electrical, RF and microwave, dimensional, force, mass, pressure, temperature, torque calibration and more; 100+ combined years of calibration experience serving the greater Phoenix area. **Tru Cal International** — Bensenville, IL | trucal.com | Electrical, dimensional, force, pressure, RF and microwave calibration and more; test equipment calibration specialists since 1992. **Utah Scale Center** — Sandy, UT | utahscalecenter.com | Industrial scale calibration and service; 70+ years of experience across the Rocky Mountain Region. **Washington Calibration** — Tempe, AZ | washingtoncalibration.com | Dimensional, force, mass, pressure, temperature, torque calibration; gage repair and calibration services for 34+ years. --- ## Calibration Services [All Calibration Services](https://www.accreditedlabs.com/calibration-services): The Accredited Labs network offers 16 categories of accredited calibration services available across member locations nationwide. In-lab, on-site, and mail-in options are available depending on service type and member location. ### Color Calibration [Color Calibration Services](https://www.accreditedlabs.com/calibration-services/color-calibration): ISO/IEC 17025 accredited calibration for color measurement, optical measurement, and surface appearance instruments used in coatings, printing, pharmaceuticals, food, textiles, and manufacturing. Specialists in the network include Color Calibration Group and CMG Sales, Inc. **Instruments calibrated include:** colorimeters (all brands including Konica Minolta, CHN Spec, 3nh, PCE Instruments), color spectrophotometers (X-Rite, Konica Minolta, Datacolor, HunterLab, BYK Gardner), densitometers (X-Rite, Techkon, 3nh), gloss meters (Konica Minolta, BYK Gardner, Rhopoint, Elcometer, TQC Sheen), light booths (all manufacturers), light meters, UV-Vis spectrophotometers, viscometers (Brookfield, BYK Gardner, Anton Paar, Thermo Fisher), and coating thickness gauges. ### Construction Materials Testing Equipment Calibration [Construction Materials Testing Equipment Calibration](https://www.accreditedlabs.com/calibration-services/construction-materials-calibration): ISO/IEC 17025 accredited calibration for equipment used to test concrete, asphalt, soil, aggregate, and other construction materials. Calibration follows ASTM International and AASHTO standards. A free CMT Equipment Calibration and Audit Readiness Checklist is available for download at accreditedlabs.com/cmt-audit-checklist. **Equipment calibrated includes:** concrete compression testing machines (hydraulic and digital), concrete flexure and tensile testing equipment, asphalt Marshall stability apparatus, nuclear density gauges, sand cone and rubber balloon density equipment, Proctor compaction equipment, concrete air content meters, concrete slump and flow testing equipment, sieve analysis equipment and sieve shakers, aggregate testing equipment, soil classification and Atterberg limits equipment, pavement coring equipment, moisture and humidity testing equipment, and temperature measurement and control equipment. Key providers include Calser Calibrations, Calibration Services Inc., and Cal Tec Process Management. ### Dimensional Calibration [Dimensional Calibration Services](https://www.accreditedlabs.com/calibration-services/physical-dimensional-calibration): ISO/IEC 17025 accredited calibration for instruments that measure length, width, height, diameter, and angles. Available at most member locations nationwide. **Instruments calibrated include:** calipers, micrometers, dial indicators, height gages, gage blocks, plug and ring gages, thread gages, optical comparators, surface plates, hardness testers, surface roughness standards, sine bars, and many more. ### Electrical Calibration [Electrical Calibration Services](https://www.accreditedlabs.com/calibration-services/electronics-calibration): ISO/IEC 17025 accredited calibration for instruments measuring voltage, current, resistance, frequency, power, capacitance, and other electrical parameters. Available at most member locations. **Instruments calibrated include:** multimeters, oscilloscopes, function and signal generators, power supplies, hipots, megohmmeters, LCR meters, power analyzers, clamp meters, data acquisition units, and many more. ### Flow Calibration [Flow Calibration Services](https://www.accreditedlabs.com/calibration-services/fluid-calibration): ISO/IEC 17025 accredited flow meter calibration for liquid and gas flow measurement applications including chemical processing, water treatment, pharmaceutical, food and beverage, and energy. Available through select member locations including PCS (Tennessee) and others. ### Force Calibration [Force Calibration Services](https://www.accreditedlabs.com/calibration-services/force-torque-calibration): ISO/IEC 17025 accredited calibration for instruments measuring push, pull, tension, and compression forces. Available at most member locations. **Instruments calibrated include:** load cells, force gages, tensile testers, compression testers, universal testing machines, dynamometers, cable tension meters, wire pull testers, and strain gages. ### Grain Moisture Tester Calibration [Grain Moisture Tester Calibration](https://www.accreditedlabs.com/calibration-services/grain-moisture-calibration): ISO/IEC 17025 accredited calibration for grain moisture testers used across the grain supply chain from harvest through processing. Available through select member locations including J&J Calibration Service (North Dakota). ### Humidity Calibration [Humidity Calibration Services](https://www.accreditedlabs.com/calibration-services/humidity-calibration): ISO/IEC 17025 accredited calibration for humidity measurement instruments used in pharmaceuticals, electronics manufacturing, food processing, and materials testing. Available through select member locations including IPM, Inc. **Instruments calibrated include:** humidity sensors, hygrometers, thermo-hygrometers, humidity data loggers, and environmental chambers. ### IR Temperature Calibration [Infrared Temperature Calibration Services](https://www.accreditedlabs.com/calibration-services/ir-temperature-calibration): ISO/IEC 17025 accredited calibration for non-contact infrared thermometers used in industrial processes, thermal imaging, medical applications, and energy efficiency assessments. Available at most member locations. ### Mass Calibration [Mass Calibration Services](https://www.accreditedlabs.com/calibration-services/mass-calibration): ISO/IEC 17025 accredited calibration for weighing instruments used in pharmaceuticals, food production, chemical processing, logistics, and general manufacturing. Follows NIST Handbook 44 and international weighing standards. **Instruments calibrated include:** analytical balances, bench and floor scales, counting scales, car scales, shipping scales, pipettes, and certified reference weights. Specialist members include Utah Scale Center (Rocky Mountain Region). ### Pressure Calibration [Pressure Calibration Services](https://www.accreditedlabs.com/calibration-services/pressure-calibration): ISO/IEC 17025 accredited calibration for pressure measurement instruments used in industrial process control, HVAC, chemical manufacturing, medical devices, hydraulic equipment, and safety systems. **Instruments calibrated include:** pressure gages (gauge, absolute, compound), differential pressure instruments, pressure transducers and transmitters, vacuum gages, and barometers. ### Proof Load Testing [Proof Load Testing Services](https://www.accreditedlabs.com/calibration-services/proof-hoist-testing): ISO/IEC 17025 accredited proof load testing for lifting equipment and hoisting systems, verifying structural integrity and safe load capacity per OSHA, ANSI, and manufacturer specifications. Testing covers overhead bridge cranes, mobile and tower cranes, chain and electric hoists, material lifts, winches, rigging hardware (slings, shackles, hooks, spreader beams), scaffolding, lifting magnets, and vacuum lifting systems. ### RF and Microwave Calibration [RF and Microwave Calibration Services](https://www.accreditedlabs.com/calibration-services/rf-microwave-calibration): ISO/IEC 17025 accredited calibration for RF and microwave measurement instruments used in telecommunications, aerospace, defense, satellite systems, and electronics manufacturing. Frequency range: 9 kHz to over 100 GHz. Specialist members include QSI (Southern California), Tescom Calibration Services (Texas), and Trident Calibration Labs (Arizona). **Instruments calibrated include:** spectrum analyzers, network analyzers, signal generators, RF power meters and sensors, RF counters, attenuators, filters, oscilloscopes, and associated RF test accessories. ### Temperature Calibration [Temperature Calibration Services](https://www.accreditedlabs.com/calibration-services/temperature-calibration): ISO/IEC 17025 accredited calibration for temperature measurement instruments used in pharmaceuticals, food safety, industrial processes, and scientific research. Available at most member locations. **Instruments calibrated include:** thermometers (glass, digital, RTD, PRT, thermocouple, IR), data loggers, chart recorders, environmental chambers, ovens, furnaces, freezers, autoclaves, and temperature probes. ### Time and Frequency Calibration [Time Calibration Services](https://www.accreditedlabs.com/calibration-services/time-calibration): ISO/IEC 17025 accredited time and frequency calibration traceable to Coordinated Universal Time (UTC) through atomic clock references. Available through select member locations including QSI (California) and Instrument Technologies (Idaho). **Instruments calibrated include:** frequency counters, microwave counters, linear counters, single-axis accelerometers, and triaxial accelerometers. ### Torque Calibration [Torque Calibration Services](https://www.accreditedlabs.com/calibration-services/torque-calibration): ISO/IEC 17025 accredited calibration for torque measurement instruments used in aerospace, automotive, manufacturing, and construction applications. **Instruments calibrated include:** torque wrenches, torque drivers, torque analyzers, torque screwdrivers, torque testers, and torque multipliers. --- ## Additional Services [Repair Services](https://www.accreditedlabs.com/repair-services): Select member companies offer repair services for test and measurement equipment in addition to calibration. Contact Accredited Labs or the relevant member company for availability. [Product Sales](https://www.accreditedlabs.com/product-sales): Select member companies sell new test and measurement equipment. Trusted partners and brands represented across the network include Fluke, Keysight, Tektronix, Mitutoyo, Starrett, Megger, Sartorius, Rice Lake, Ohaus, and Avery Weigh-Tronix. --- ## Industries Served [Industries Served](https://www.accreditedlabs.com/industries-landing): The Accredited Labs network serves a broad range of industries requiring ISO/IEC 17025 accredited calibration for compliance, quality control, and regulatory audits. Industries include: aerospace and defense (AS9100, FAA), automotive manufacturing (IATF 16949), pharmaceuticals and life sciences (FDA/cGMP, USP), medical devices and healthcare (ISO 13485, FDA), food and beverage (HACCP, food safety), chemical manufacturing and processing, electronics and semiconductor manufacturing, construction materials and civil engineering (ASTM, AASHTO), oil and gas, energy and utilities, telecommunications, general manufacturing (ISO 9001), engineering and R&D, and government/public administration (MIL STD 45662A, OSHA). --- ## Frequently Asked Questions **What calibration services do you offer?** The network offers 16 service categories: color, construction materials testing equipment, dimensional, electrical, flow, force, grain moisture, humidity, IR temperature, mass, pressure, proof load testing, RF and microwave, temperature, time and frequency, and torque calibration. **How often should equipment be calibrated?** Annual calibration is standard for most instruments. Regulated industries and high-use or safety-critical tools may require more frequent calibration. Your Accredited Labs member company can advise on appropriate intervals for your specific instruments. **What is the standard turnaround time?** Standard turnaround is 5–7 business days. Expedited service is available upon request. **Do you offer on-site calibration?** Yes — most member companies offer on-site calibration services. Contact your local branch to confirm availability for specific service types. **Which accreditation body do you use?** Member companies are accredited by A2LA (American Association for Laboratory Accreditation), NVLAP, or ANAB depending on the member location. All hold ISO/IEC 17025 accreditation. **What does ISO/IEC 17025 accreditation mean?** It means the lab has been independently assessed and confirmed to meet the international standard for calibration laboratory competence. Results are globally recognized and suitable for compliance with ISO 9001, IATF 16949, AS9100, ISO 13485, FDA/cGMP, and MIL-SPEC requirements. **What does NIST-traceable mean?** NIST traceability means calibration results can be linked back to national standards maintained by NIST (National Institute of Standards and Technology), providing an unbroken chain of measurement accuracy required by most quality management systems and regulatory bodies. **How do I find my nearest calibration lab?** Use the branch locator at accreditedlabs.com/companies to search by address or zip code. **How do I schedule service?** Fill out the request form at accreditedlabs.com/contact or call 1 (888) 737-0030. You will be connected with the appropriate branch for your location and needs. **Can Accredited Labs acquire my calibration company?** Yes — Accredited Labs actively pursues acquisitions of regional calibration companies. Visit accreditedlabs.com/acquisitions to learn more. --- ## Resources [Blog](https://www.accreditedlabs.com/blog): Technical articles on calibration best practices, instrument care, industry compliance, torque wrench accuracy, scale accuracy, and more. [FAQ](https://www.accreditedlabs.com/faq): Answers to common questions about calibration services, accreditation, turnaround times, and scheduling. [Glossary](https://www.accreditedlabs.com/glossary): Definitions of key calibration and metrology terms. [CMT Audit Checklist](https://www.accreditedlabs.com/cmt-audit-checklist): Free downloadable checklist covering calibration criteria and interval guidance for construction materials testing equipment, aligned to ISO/IEC 17025 and AASHTO audit requirements. [Branch Locator](https://www.accreditedlabs.com/companies): Find your nearest Accredited Labs member company. [Accreditation Scopes](https://www.accreditedlabs.com/accreditation-scopes): View accreditation scope documents for all member companies. [Request a Quote / Schedule Service](https://www.accreditedlabs.com/contact): Get a tailored quote with transparent pricing — no hidden fees. [Careers](https://www.accreditedlabs.com/careers): Open positions across the Accredited Labs network. --- ## Contact **Phone:** 1 (888) 737-0030 **Email:** inquiry@accreditedlabs.com **Corporate HQ:** 1212 Corporate Drive, Suite 100, Irving, TX 75038