GEM Systems Inc.

GEM Advanced Magnetometers

GEM has had a long and growth-oriented history - starting as
Geophysical Electromagnetic Systems, a consulting partnership,
and incorporating in 1980 as GEM Systems, Inc. Formed by Drs.
Ivan Hrvoic and Jasna Hrvoic, the company continues to be managed
by Dr. I. Hrvoic - who contributes many years of expertise in
geophysical instrumentation and electronic design.

In the late 60's and early 70's, Dr. Hrvoic worked as Senior
Research Engineer with another instrument manufacturer. 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 by GEM in 1983
through a research grant, and led to the first of an innovative
series of magnetometer / gradiometer technologies.

Commercial success of the GSM-8 proton precession magnetometer
led to early expansion and creation of the GSM-9, the first
pulsed Overhauser magnetometer and the portable Overhauser
Memory Magnetometer. GSM-10 and 18 magnetometers were also
developed and were received well in the resource exploration
market.

The company has also developed solutions for other fields, such
as UXO, volcanology, earthquake prediction, and engineering and
environmental disciplines. As the company's reputation as a
proven supplier of instrumentation for total field measurement
grew, they branched into other fields including the observatory
field. Today, Overhauser magnetometers have replaced many of the
conventional proton precession installations around the world.

GEM's first airborne project was a vertical helicopter-borne
gradiometer. It was based on a simple, yet effective
self-oscillating Overhauser system. The company also developed
the inexpensive GSM-11 airborne magnetometer that contributed to
the commercial success of several airborne survey companies.

Airborne initiatives continue to be a strong focus, especially
with the commercialization of a new
GEM-developed potassium optically-pumped technology that is
designed to address the limitations of traditional cesium
sensors.

Following expansion in 1987, the company launched the GSM-19.
This memory magnetometer combines Overhauser technology with
proprietary free-radical solutions and firmware that is also able
to accept other geophysical methods such as VLF and multiple
gradiometer channels.
With the success of the GSM-19 Overhauser system, the company has
dedicated significant effort in making this unit one of the most
advanced magnetometer technologies today.

GEM's development work continues today with development and
evolution of the next generation of Potassium Optically Pumped
magnetometers and gradiometers. These systems will provide
increased sensitivity and survey efficiency for both airborne and
ground survey applications.

Company Details

Year Established: 1980

Company Information

Greg Hollyer
Title: Marketing Manager
Telephone: (905) 764-8008
Fax: (905) 764-2429
Email: Click Here

Products

Geophysical Instrumentation - Magnetometers / Gradiometers / Vlf

Gsm-19 Overhauser Magnetometer / Gradiometer / Vlf
Overhauser magnetometers use electron-proton coupling to produce an order-of-magnitude stronger precession signals than conventional proton precession magnetometers. This results in improved signal-to-noise ratio. GEM's GSM-19 -- the only commercial Overhauser system - delivers a sensitivity of 0.015 nT combined with robusteness and low power consumption. Its also features a built-in GPS option for high positioning accuracy and reduced grid surveying costs. A VLF electromagnetic surveying option is also available. Applications include mineral exploration, environmental surveys, pipeline mapping, archeological, airborne base station, and other earth science applications.

Gsm-19t Proton Precession Magnetometer / Gradiometer / Vlf
The GSM-19T is a state-of-the-art Proton Precession Magnetometer / Gradiometer system for end-to-end data acquisition at an affordable price. The new version 6.0. system delivers many upgrades including a built-in GPS option for high positioning accuracy and reduced grid surveying costs, 25% increase in sensitivity, enhanced memory and programmable base station option. A VLF electromagnetic surveying option is also available. Applications include mineral exploration, environmental surveys, pipeline mapping, and other earth science applications.

Gsmp -30a Airborne Magnetometer / Gradiometer
The 'SuperSenser' is very high resolution airborne magnetometer / gradiometer system. Available as either a complete system or as a single sensor, the GSMP-30A operates on a unique technology known as Potassium Optical Pumping. This technology generates very high sensitivity with low heading error for airborne implementations. Applications include mineral and hydrocarbon exploration, environmental assessments, UXO detection, pipeline mapping and other earth science applications.

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