GEM Systems Advanced Magnetometers
Magnetometer, Magnetometers, Geophysics, Magnetic sensor, Magnetic sensors, Gradiometer, Gradiometers, GPS technology, Magnetic field sensors, Magnetic field sensor, Proton precession, Optically pumped magnetometer
http://www.gemsys.ca/

Voyager Magnetometer Experiment (MAG)
The Voyager Magnetometer Experiment
http://lepvgr.gsfc.nasa.gov/

Schonstedt Instrument Company
Schonstedt Instrument Company Makes Underground Locating Easier
http://www.schonstedt.com/

Billingsley Magnetics
Designs very low noise fluxgate magnetometers, gradiometers, and calibration systems for spacecraft attitude control.
http://www.magnetometer.com/

Bartington Instruments
Bartington Instruments home page
http://www.bartington.com/

Marine Magnetics Corporation
Specialises in the design and manufacture of oceanographic magnetic exploration equipment including marine magnetometers and gradiometers.
http://www.marinemagnetics.com/

Stefan Mayer Instruments
Homepage of Stefan Mayer Instruments, fluxgate magnetometers, permeability meters, magnetic field compensation & more
http://www.stefan-mayer.com/

Speake Sensors and Co Ltd
Speake & Co manufacture and supply their unique range of Magnetic Field Sensors. These are augmented by a series of ASICS (Application Specific Integrated Circuits) to facilitate specific applications. e.g. gaussmeters, vehicle detectors, compasses, magnetometers and gradiometers.
http://www.speakesensors.com/

Quakefinder
Satellites and ground systems incorporate magnetometers to detect electromagnetic signals associated with earthquakes. These early warning systems can be used for earthquake forecasting and earthquake preparedness.
http://www.quakefinder.com/

Innerspace Exploration Team
Nonprofit organization specializing in side scan sonar services including drowing victim search and recovery.
http://www.innerspaceexploration.org