GEM Systems
GEM has had a long and storied history – starting as Geophysical Electromagnetic Systems, a consulting partnership. The company incorporated in 1980 as GEM Systems, and is now known in industry as GEM Systems.
Formed by Drs. Ivan and Jasna Hrvoic, the company continues to be managed by Dr. Ivan Hrvoic who contributes many years of experience in geophysical instrumentation and electronic design.
In the late 1960’s and early 1970’s, Dr. Hrvoic worked as Senior Research Engineer with Scintrex Ltd. During this time, initial research was conducted into the feasibility and design of a Continuous Reading High Sensitivity Airborne Overhauser Magnetometer.
This work was completed in 1983 through a research grant and led to the first of an innovative series of magnetometer/gradiometer technologies featuring three main physical principles – Proton quantum magnetometer, Overhauser quantum magnetometer, and the optically pumped Potassium quantum magnetometer.
GEM celebrated 43 years leading the world of Magnetics in 2023
The company has been a leader in providing geophysical instruments for ground surveys based on its Proton, Overhauser and Potassium sensors and systems. GEM systems are reliable. There are stories of mags coming in for repair after 26 years in use!
Some novel developments include the “Walking Mag” – the first magnetometer to provide the operator with the ability to walk continuously while making measurements. This walking mode has increased productivity by 3 to 5 times on the ground since sensor staffs and discrete measurements are no longer required. While this technology has been copied by competitors, GEM remains the originator and developer of the most advanced Walking technologies for magnetometers and gradiometers on the planet today.
Sampling rates delivered by the Overhauser and Potassium systems are suitable for new survey approaches, such as automation. With automation, sensors are mounted on a platform (All-terrain-vehicle, sled, bicycle, or other towed conveyance) and advanced at a rapid rate (5 to 10 km) along the ground surface – resulting in a significant productivity gain for those using one of GEM’s towed carts for instance.