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Main Office:

1395 N Hayden Rd Scottsdale, AZ 85257

Calibration Industry Service Leader

National Calibration Inc. (NCI) is an A2LA accredited calibration and repair service company providing service and sales for measuring and test equipment to clients across the United States.

Fortune 500 clients and thousands of valued small clients have relied on NCI for decades, due to our accuracy of calibration,
short turnaround time and competitive pricing.

In the test and measurement business for over 50 years,
NCI was first in the southwest to earn A2LA accreditation.


Tool Calibration & Repair

National Calibration Inc. (NCI) provides a certificate with data and traceability documentation as requested to meet client compliance requirements dictated by industry standards and accrediting bodies.

Audits are easier with paperless records. We utilize
online tracking and electronic reports.

NCI provides regular, on-site service with discount fees for many cities in the Southwest. For the best rates, ask us when we’ll be in your area.

Growth and Development

We have grown rapidly and experienced continuous improvement in client service and profitability as a result of our affiliation. WTI, Inc. is seeking additional quality-oriented calibration companies to support as independent regional platforms for growth.

A2LA Accredited
NCSL and NAPT Members

National Calibration Inc. (NCI) follows guidelines set forth in ISO/IEC 17025:2005 and ANSI Z540-1, and is accredited to those standards by the American Association for Laboratory Accreditation (A2LA). NCI is a member of the National Conference of Standards Laboratories (NCSL) and National Association for Proficiency Testing (NAPT). Our laboratories and regional field offices issue calibration reports that contain the “accreditation logo” within our accredited service scope.

Representative Clients The following is a representative sample of NCI Fortune 500 clients:

  • Air Products and Chemicals
  • Alcoa, Inc.
  • Applied Materials
  • Avnet, Inc.
  • Baxter International
  • Ford Motor Company
  • Goodrich Corporation
  • Honeywell International
  • Intel Corporation
  • Johnson Controls
  • Lockheed Martin
  • Praxair, Inc.
  • Rohm and Haas Company
  • Southwest Airlines


Frequently Asked Questions

National Calibration Inc. (NCI) strives to provide our customers with answers to their common questions. Select questions below to see their answers.

NCI's regular hours are Monday-Friday 8am-5pm (refer to Locations for time-zones).

Observing the standard U.S. holidays: New Years Day, Memorial Day, Independence Day, Labor Day, Thanksgiving Day and day after and Christmas Day.

On-Site calibration downtime is the most efficient, your equipment will only be out of service during the short time our technician is on-site.
For equipment in our labs, NCI's standard turnaround time is 7-10 business days.

To coordinate a shorter turnaround, call us (phone numbers at bottom of page), or talk with our receiving department when you drop off your equipment.

Yes - Here's a link to NCI's accreditation certificate on the official A2LA site.