GEM Systems, Inc. products

The most sensitive, commercially available magnetometer is the Potassium magnetometer/gradiometer system. The GSMP-35/25 ground system is the highest sensitivity with the greatest absolute accuracy instrument for subsurface investigations in numerous fields, including, but not limited to, mineral prospecting and exploration, oil & gas exploration, UXO detection and discrimination, and environmental & engineering. The GSMP series of magnetometers have the absolute maximum in data quality – exceeding that of conventional Cesium Magnetometer devices by an order-of-magnitude, or more! Data quality is driven by sensitivity, minimal heading error, high absolute accuracy, no microphony, and overall design. Unlike its cesium magnetometer cousin, Potassium offers a thin spectral line of operation – meaning that there are fewer drop-outs and errors during surveying. In the event of a drop-out, it is easy to spot in Potassium magnetometers unlike cesium magnetometers.

GEM’s Overhauser Magnetometer system is a revolutionary geophysical instrument developed by GEM to offer a rugged, low power, and sensitive alternative to Proton Precession and some other alkali vapour magnetometers. GEM’s GSM-19 (Overhauser) magnetometer is a primary standard in mineral exploration and magnetic observatories. As a standard for magnetic observatories, this system has proven itself – for its high sensitivity, absolute accuracy and long life. Overhauser magnetometers are also used in archaeology, pipeline mapping, UXO detection, and other engineering and environmental applications.

GEM’s advanced Proton Precession magnetometer (GSM-19T) is one of the world’s leading instruments for subsurface investigations and exploration. The Proton system is designed to fit the niche for clients who require a low-cost, yet robust and reliable magnetometer for ground geophysical surveys. This system is an entry-level system for clients who require an advanced system without the higher-order features and benefits of GEM’s Overhauser and Potassium systems.

Ground and Airborne Conductor mapping and Cost Effective Resistivity Solutions. Very Low Frequency Electromagnetics (VLF) is a geophysical ground probing technology that utilizes VLF signals in the 15 to 30 kHz range normally used for communication with submarines. The signal generated is suitable for making geophysical measurements globally.

Airborne Magnetometer and EM Solutions. The worldwide application of airborne magnetic and gradiometric data is growing, driven by demand for high-resolution, low cost data to:
Map targets, geology and geologic structure in Mineral Exploration and Mineral Prospecting
Perform frontier evaluation, augment seismic data in Hydrocarbon Exploration. Detect Unexploded Ordnance (UXO). ap pipelines and other cultural objects in Environmental and Engineering investigations. Map acquifers and faults in Groundwater work. To address industry requirements, GEM introduced the state-of-the-art Potassium, the highest sensitivity magnetometer/gradiometer airborne system commercially available. It also features a number of other benefits, including maximum gradient tolerance and more.

GEM Systems developed the DRONEmag™ (GSMP-35U/25U) to be the first light-weight, high sensitivity magnetometer specifically designed for UAVs. At a weight of less than 1 kg, this Ultra Light-Weight Sensor opens up new avenues for magnetometer surveys The sensors are based on GEM’s popular optically pumped Potassium Magnetometer sensor, which offers the highest sensitivity, absolute accuracy and gradient tolerance available in the industry. The 0.2 pT sensitivity potassium magnetometer forms the core of GEM’s UAV solutions.

The AirBIRD is a turnkey light-weight towed-bird magnetometer system designed specifically for UAVs. This system has everything needed to carry out high precision magnetometer surveys from an UAV The AirBIRD weighs 3.5 kg and therefore is suitable for medium and larger quadcopters and helicopter UAVs. The recommended minimum airspeed is 10 m/s. The system is designed to simply be attached to an appropriate UAV for immediate survey operations As well as providing high quality magnetic data, the AirBIRD records and stores additional flight parameters. Altitude, GPS location, Pitch, Roll, Yaw, and Satellite information can all be transmitted in real time to the ground station and displayed with GEMDAS, our custom data acquisition software. The GEMDAS software features include Multi-Window display of mag data and flight parameters, 3D Graphic Attitude display, and Integration with Google Earth.

Empower your UAV with the CARDINAL, an ultra-lightweight towed magnetometer system designed to deliver unparalleled accuracy and efficiency in magnetic surveys. Weighing in at just 1.5 kg, the CARDINAL seamlessly integrates with smaller drone platforms, enabling seamless data acquisition even in confined spaces. Unparalleled Precision with Optically Pumped Potassium Magnetometer. At the heart of the CARDINAL lies an optically pumped potassium magnetometer renowned for its unmatched sensitivity and accuracy. With a remarkable noise floor of 0.0001 nT, the CARDINAL unveils even the subtlest magnetic anomalies, revealing hidden archaeological features, underground pipelines, and more.

VLF Theory: The Very Low-Frequency (VLF) Electromagnetic Method (EM) survey technique is a passive method that utilizes distant, globally positioned transmitters that are broadcasting at frequencies in the range of 15.0 – 30.0kHz. In a VLF investigation the primary fields (generated by the radio transmitters) are horizontal, vertical deviations are measured (which are effected by local ground conditions).

Many magnetic observatories today rely on a combination of scalar, fluxgate and theodolite instruments for obtaining measurements. Research installations engaged in volcanology applications are also using scalar magnetometers for stationary work. GEM’s Overhauser GSM-90 EUROMAG is particularly suited to these applications (and volcanology). This is a standard magnetometer without a display screen that can be operated via computer.