Applied Physics Systems is a worldwide leader in the design and manufacture of high-performance magnetometers, directional an ... d gamma sensors, and complete Measurement While Drilling (MWD) systems. Our products are used in oil and gas exploration, Horizontal Directional Drilling (HDD), and many other scientific applications. In addition to our standard product offering of sensors and drilling systems, we have expertise in electrical, mechanical, and computer software systems. We design and build custom instruments for integration into your OEM products. Applied Physics Systems is also a world leader in the design and production of superconducting geophysical instruments including Rock Magnetometer systems and accessories. These systems are produced in partnership with William S. Goree, Inc. and are sold under the 2G Enterprises name. 2G has its own web site with complete information on the instruments offered: http://www.wsgi.us/WSGI/HOME.html read more