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Phone: (877) 243-8832
Mon-Thurs, 9AM–4:30PM
Friday, 9AM–4PM
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Fax: (877) 329-9832

Accredited Calibration Labs

The California VFC Program requires calibration testing annually or every other year for all digital data loggers. 

There are several accredited laboratories that perform calibration testing services, here is a small list to get you started.  Accredited Labs may also be found using the additional resources listed at the bottom of the page. (Updated 5/21)


Accredited Labs Address Telephone Accreditor
Control Solutions, Inc. 35851 Industrial Way, 
Suite D
St. Helens, OR 97051
503-410-5996 PJLA
Merit Calibrations* 7923 Warner Avenue. Suite K Huntington Beach, CA 92647 657-259-0597 ISA
MDQ Calibration 879 Maple Street
Contoocook, NH 03229
603-746-5524 PJLA
Onset Computer Corporation (Onset products only) 470 MacArthur Blvd. Bourne MA, 02532 800-564-4377 ANAB

*Provides on-site calibration services

Additional resources:

You may also search these sites for a lab accredited specifically for digital data logger calibration.