About Us

Knopp Inc. is a design and manufacturing company located in Emeryville, California, USA (alongside beautiful San Francisco Bay). We have been in business since 1928.

Our primary products are transformer test equipment, precision voltage and current transformers, and electrical instruments. Our customers include electric utilities; manufacturers of transformers and electric motors; government (federal, state, and municipal); and professional electricians.

Our Services


Contact Us

Call us at

(800) 227-1848

Or submit your information and we will contact you regarding your needs.

Manufacturers & Distributors

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Engineers & Designers

We listened - sourcing equipment is a pain and comparing equipment data online is impossible. Therefore, we’ve built a powerful database to fix that.

Shipyards & Vessel Owners

We listened - calling, emailing and faxing numerous Vendors creates long exhaustive days. Therefore, we’ve built a powerful platform to streamline communication.