Primary Instruments, Inc. is a duly recognized and accredited calibration laboratory located in Chatsworth, California. For 25 years, our expertise in measurement and testing has proved to be of worth to our clients in various industries.
Evolving from a solely mechanical/general services calibration lab to a facility that boasts a wider range of capabilities. Primary Instruments, Inc has never ceased to incorporate the person to person approach.
We put mind, heart and soul to our work, this is value added to our relationship with our most important asset, our customer.

Primary Instruments, Inc., was established in 1978 and has become a leading provider of third party calibration and repair services to the aerospace, fiber-optics, electronic, automotive, semi-conductor and medical-pharmaceutical industries.


Our list of satisfied clients include Intel, Medtronic MiniMed, Lockheed Aerospace, AER Technologies, BAE and Newport Corp.
We have a Qualified Team of Engineers and Metrologists highly skilled and experienced in providing technical expertise all working in a focused delivery culture.