Innovation and Reliability
Since 1980

Mar 25 2015

Robotic Geophysical Mapping

GEM Systems is collaborating with Carleton University on a 6 month project to demonstrate that the Canadian Kapvik space exploration rover can be used to make geomagnetic measurements. The goal of the project will be to demonstrate that that the two (2) technologies (magnetometer and rover) can work together. It is anticipated that the development of a custom-made boom for the rover will be required to overcome the magnetic interference of Kapvik. Through the project GEM Systems will demonstrate that its UAV Magnetometer sensor is lightweight and versatile enough to be used on a high tech rover, in addition to a…


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Feb 4 2015

Magnetics in Archaeology

Magnetics are an increasingly key exploration method for archaeological applications. Main benefits lie in the ability to resolve details non-invasively, the wide range of artifacts and cultural affects that are detectable, and the low-cost of magnetics in comparison to other geophysical methods.   Having detailed knowledge of a site prior to investigation reduces excavation costs while ensuring that no part of the site is missed. In addition, as many projects are time sensitive, availability of a rapid, effective method may mean the difference between recovery and non-recovery.   GEM’s unique Overhauser & Potassium magnetometer/gradiometer systems combine data quality, survey efficiency,…


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Jan 29 2015

Programmable Base Stations

GEM’s base station units enable remote programming via either a personal computer or the base station unit itself. The main benefit is more efficient use of memory and batteries while in the field. For example, a base station can be pre-programmed and left in the field for a month or more of operation – minimizing the infield maintenance and support of base station units on either airborne or ground surveys.     3 Programming modes are provided: Daily Scheduling (define working hours and minutes each day) This mode provides economy of memory and battery usage on a daily basis Flexible…


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Jan 12 2015

NEW: Three-Year Warranty

  GEM Systems Inc. has a reputation for delivering the most reliable magnetometers and gradiometers in the industry. We also support our reputation with the longest warranty available.   All GEM Overhauser, Potassium, and Proton Precession magnetometers and gradiometers, excluding batteries and third-party components (ie. GPS), are guaranteed for replacement of defective parts and labor for three years from shipping date. (Shipping costs are not included.)   Please note that any unauthorized opening of the sensor or console without written consent of GEM Systems, Inc. will void the warranty.   For more information on this new warranty program, please contact GEM at…


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Dec 5 2014

GEMLink+ – Much More than Communication Software

GEMLink+ pre-processing software, which is provided with every magnetometer system GEM Systems manufactures provides diurnal correction, profile plotting and some basic mapping and modeling functions. GEMLink+ provides all of the data visualization features needed by the geoscientist to quickly assess the data quality of an acquired data set. Since the Earth’s magnetic field varies with time, a base station magnetometer is needed to monitor and record the variations with time. Applying the “diurnal” corrections is another function of the GEMLink+ software. GEMLink+ can import and export Google KMZ files too; the only caveat is that co-ordinates need to be in…


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Dec 1 2014

Potassium Vapour Magnetometers – A Short Summary (Part 3)

Broad Line Versus Narrow Line Spectra Potassium and Rubidium have 6 spectral lines of various intensities, Cesium 133 14 and Helium 4 just one but very wide. Width of the spectral line depends on many parameters such as the size of cells, collision of the atoms with the walls of the cells, collision with buffer gas, spin exchange, etc. Contemporary Cs and Rb magnetometers have wide overlapping spectral lines. A composite spectral line is not symmetrical but the position of its peak depends on the geometry of the sensor and the applied magnetic field. There is a large shift in…


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Nov 26 2014

Potassium Vapour Magnetometers – A Short Summary (Part 2)

By Dr. Ivan Hrvoic, President, GEM Systems, Inc. Optical Pumping of Alkali Vapours Only unpaired and free electrons exhibit spin with the features described above. Vapours of the alkali group of elements have a single, unpaired electron in their valence shell and they can be readily used as sources of electrons with spins. Helium gas in the other hand needs to be ionized in order to eliminate one electron from the valance shell; the remaining electron then behaves as an unpaired electron. In ground state 2 S1/2 the electron has 2 energy levels, or –1/2 or +1/2 spins. To polarize…


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Nov 18 2014

Potassium Vapour Magnetometers – A Short Summary (Part 1)

By Dr. Ivan Hrvoic, President, GEM Systems, Inc. Introduction This paper is intended to provide a short overview for professionals and students who are interested in learning more about potassium magnetometers and their differences from other types of magnetometers available today. Key topics include: Physical overview of quantum magnetometers Optical pumping of alkali vapours Broad line Cesium, Rubidium and Helium versus narrow line Potassium Standard and super-resolution K-sensors and systems Future directions This paper is based on more than 10 years of research and development into the topic by GEM Systems, Inc. as well as other published results from the…


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Oct 16 2014

Magnetic Data in the Oil & Gas Industry

Did you know ?  In the upstream oil and gas industry, airborne magnetometer surveys can be used to detect a variety of near-surface hazards that are difficult to resolve in seismic data. Magnetic data will help identify fault zones, and orphaned well/drill hole and other iron-based infrastructure, associated with old and undocumented oilfield infrastructure. Gas migrates toward the surface along naturally occurring faults and frequently, it gets trapped in shallow structures also difficult to see on seismic images. Drilling into a shallow gas pocket on the way to a deep target can result in huge unexpected costs for the operator.…


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Sep 22 2014

Using Ultra High Sensitivity Magnetometers to combat Poaching

The group that oversees anti-rhino poaching operations along the western front of the Kruger National Park in South Africa has been looking for a means to improve the detection of armed insurgents. Infra-red sensing has limitations in day-time, due to high ambient temperatures and lack of penetration through vegetation cover. The area is vast (2,000 sq. km’s) but airborne investigations are only launched once there is some information as to the whereabouts of insurgents. Tree and bush cover is dense, and poachers can easily avoid visual detection from the air by taking cover. An item as small as rifle will…


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