Marschall Acoustics Group - Provides a wide range of geophysical sensing and measurement instrumentation, including solid towed hydrophone arrays, solid state geophones, and electromagnetic imaging and analysis systems.

Earth Science Systems Ltd. - Specialists in the sale, rental and repair of geophysical equipment including radar, resistivity, magnetometers, seismic, borehole logging. Company located in the U.K.

Mount Sopris Instruments - Manufacturers of borehole geophysical logging systems for the geological, natural resource, and environmental communities.

Bartington Instruments - Manufactures fluxgate magnetometers, magnetic field sensors and magnetic susceptibility systems for soils and rocks.

Seistronix - Seistronix manufactures, leases and sells exploration seismographs and related geophysical equipment for oil, gas, mineral and general geotechnical exploration

IRIS Instruments - Manufacturer of equipment for geophysical, geotechnical and environmental in-the-field investigations. Site in English, French, and Spanish.

Carl Hamm, UK - Supplies geotechnical equipment for site investigation. Including dynamic probing, window sampling and hand and motorized augers

Georadar - Offers ground-penetrating radar (GPR) systems for locating buried objects in the ground.

Sensors and Software Inc - Advanced ground penetrating radar technology to map metallic and nonmetallic objects and material variations below the ground surface.

Geonics Limited - Manufacturer of electromagnetic geophysical survey systems.

Geometrics Inc. - Manufacturer of geophysical instruments for subsurface investigation.

Exploration Electronics - Leases seismic survey equipment to the high-resolution and site survey offshore markets.

NOMIS Seismographs, Inc. - Manufacturer of seismic monitoring equipment.

3Dgeophysics.com - Sells, rents and services geophysical instrumentation used on environmental, geotechnical and mining projects.

Icefield Tools Corporation - Manufacturer of digital borehole survey tools for the mining, geotechnical, and oil and gas industry.