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3 companies

Humphrey Inc.

San Diego, CA, United StatesUpdated Sep 2017

Humphrey, Inc. designs and manufactures precision guidance, control, and directional survey equipment including gyroscopes, rate sensors, accelerometers, magnetometers, and optical compasses for marine, aircraft, and missile applications.

Marine Magnetics

Markham, ON, CanadaUpdated Feb 2008

Our magnetometers and gradiometers are currently in use by Navies, research institutes, Universities, archaeologists, geophysicists and survey companies around the World.

Schonstedt Instrument Co.

Reston, VA, United StatesUpdated Nov 1998

Schonstedt Instrument Company is an American manufacturer founded in 1953, specializing in the design and production of magnetic locators and pipe & cable locators used in surveying, construction, and utilities industries.