For a complete operation details, read the "GEM-2 Principle of Operation."
The GEM-2 package consists of the sensor boom (ski), the console, a battery charger, and a shoulder strap. It also includes a CDROM containing the manual and the operating software - WinGEMv3 - that runs on Windows.
GEM-2 in a shipping case
| Programmable Operation | ||
| Bandwidth: | 330 Hz to 24 kHz | |
| Frequency Domain: | Single Frequency, Multiple Frequencies, Stepping Frequencies | |
| Maximum Sampling Rate: | 30 Hz | |
| Hardware | ||
| Removable Ski: | Sealed Kevlar or fiberglass foam, 2kg | |
| Console (CPU, display): | 10 x 25 x 5cm anodized al box, 2.5 kg | |
| Internal Rechargeable Battery: | 13.2 VDC | |
| Coil Configuration: | Horizontal or Vertical Coplanar | |
| Output: | Inphase and Quadrature in ppm at all specified frequencies | |
| Maximum TX moment: | 3 Ampere square meters | |
| Operating Software | ||
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Program upload and data download from a PC: WinGEMv3 |
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| Optional Software | ||
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PPM to conductivity conversion program |
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| Data processing and display software | ||
| Real-time data output option for GPS integration | ||
| Layered earth inversion program | ||
GEM-2 Usage
The GEM-2 is most commonly used as a hand-held sensor. Whether the operator is standing still, walking, or running, the instrument accurately maps variations in electrical conductivity and/or magnetic susceptibility.
Some users have come up with uncommonly creative ways to employ the GEM-2 in their surveying tasks, such as:
The GEM-2 is part of the GEM-series of electromagnetic sensors pioneered by Geophex. This series includes GEM-2, GEM-2A, GEM-2H, and GEM-3.
GEM-2A: Helicopter-Towed Version for Geological Surveys
GEM-2H: High-Moment with Larger Transmitter and Receiver Coils
GEM-3: Monostatic Sensor for Metal Detection and Discrimination
For serious surveys, use Geophex GemDas Sunlight-Visible Touch-Screen Datalogger
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To buy or rent GEM-2, go to Ordering Information