Servicing Woodbridge, Gainesville, Haymarket, Dumfries, & Nokesville, VA.

With over 35 years of experience, our technicians have provided precise calibration, instrument repair, and metrology database management to a diverse range of industries across the Prince William County area.

Located in Gaithersburg, MD, our calibration laboratory—accredited to ISO/IEC 17025:2017, ANSI Z540-1, and Z540.3 standards—adheres to strict quality protocols. We perform all calibrations and repairs in line with manufacturer specifications to ensure your measurement tools remain reliable, repeatable, and audit-ready. Each calibration is accompanied by a certificate that confirms compliance with the rigorous standards set by the National Institute of Standards and Technology (NIST).

Prince William County, VA spans from the Washington D.C. suburbs in Woodbridge and Manassas to more rural areas toward the Virginia Piedmont. The county’s industrial base includes defense contractors supporting nearby Quantico Marine Corps Base, light manufacturing operations, and data center facilities expanding along the I-95 corridor. Organizations here require calibration services for electronic and RF instruments, dimensional measurement tools, and temperature monitoring equipment used in manufacturing, testing, and regulated operations.

Tra-Cal serves Prince William County clients from our Gaithersburg, MD laboratory, approximately 45 miles from Woodbridge via I-95 and 35 miles from Manassas via I-66. Pickup and delivery is available throughout the county. For Quantico contractors and other defense clients, Tra-Cal’s ISO/IEC 17025-accredited calibration certificates with NIST-traceable documentation satisfy the requirements of military calibration programs, ISO 9001 quality systems, and federal contract quality assurance provisions.