Solutions for In Situ Applications

Scientists continue to unlock the mysteries of the earth's magnetic field through a global network of observatories, and volcanology and earthquake monitoring facilities. And GEM is contributing by delivering advanced magnetometers to many public and private groups.

EUROMAG Magnetic Observatory / Volcanology System

The GSM-90 EUROMAG is a scalar magnetometer of high absolute accuracy (0.2nT) and low long term drift (0.05nT / year). It is optimized for use in magnetic observatories, long term monitoring arrays in volcanology, etc. where the following are essential:

• long term stability and high accuracy
• high resolution and low noise (0.02nT)

For a brochure, click here.

dIdD Magnetic Observatory System

dIdD is a vector magnetometer, offering an integrated design for continuous monitoring of the Inclination and Declination, and total field intensity of the Earth's magnetic field.

The system employs a mutually orthogonal coil setup that -- through a simple measurement methodology -- offers superior stability in comparison with fluxgate magnetometer instruments used for similar applications.

GEM's approach is unique in that the magnetic field components are determined measuring one unbiased and four biased values of total magnetic fields with an integral Overhauser magnetometer (GSM-19) design.

GEM's dIdD units are used for control of absolute values of the magnetic field components collected with traditional fluxgate magnetometers. To download a dIdD brochure, click here.

A more economical Observatory GSM-90 is also available. To see this brochure, click here.

SuperGrad - The Evolution of Gradiometry

Because of their inherent sensitivity to subtle shifts in the Earth's magnetic fields, gradiometers are in demand for volcanological and earthquake hazard applications in which events may be preceded by subtle magnetic field changes.

For this kind of application, GEM offers SuperGrad™ - the highest sensitivity total field magnetic device ever developed. The system is in use, for example, in Israel where scientists are performing long-term monitoring in the vicinity of the Dead Sea Rift.

The GSMP-20S3 is an order-of-magnitude more sensitive than other gradiometers, with a 0.00001 nT p-p sensitivity at a sampling rate of 20 Hz, averaged over a 1 second interval.

It also delivers the benefits of a Potassium-based device, including high absolute accuracy, almost no orientation errors and minimal maintenance (i.e. no calibration or alignment). For a brochure, click here.