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All expedited calibrations need to be approved by Essco personnel before they are scheduled. Learn more about expedited options.

Essco Calibration Laboratory

27 Industrial Avenue, Unit 9
Chelmsford, MA 01824 USA

Phone: 800-325-2201

Fax: 978-256-1331


Office Hours:
Mon-Fri: 8am - 5pm

Shipping & Receiving*
Mon-Fri: 6am - 11pm