Sales Products :: Electromagnetic
Geometrics StrataGem
The StrataGem is a high frequency Hybrid CSAMT system.
The Stratagem EH4 uses the magnetotelluric (MT) method to measure subsurface conductivities. The MT method is based on the fact that the ratio of the magnetic field to the electric field at a given frequency is a constant for a constant resistivity. The StrataGem, uses natural fields created by lightening strikes and is augmented by a field generated by a local transmitter, shown above. Compared to other MT systems, because the StrataGem is operating at relatively high frequencies, the Stratagem is quite a rapid tool ,with data acquisition , once a station is established taking of the order of 5-10 minutes.
Data is visually presented on the screen of the console, and once two or more stations have been acquired a 2D section can be drawn on the screen for in-field QC of data.
Applications Include
- Groundwater surveys
- Depth to bedrock
- Engineering and environmental studies
- Geological structure mapping
- Mineral Exploration
- EM and MT Research
Additional Images
Technical Specifications
| Operating Principle | Frequency domain tensor EM, natural and controlled source |
| Operating Range | 10 Hz to 100 KHz, low frequency option available |
| Transmitter | Model TxIM2 with Vertical loop antenna |
| Transmitter range | 1 KHz to 70 KHz |
| Antenna Moment | 400 amp -msq, Larger moment antenna available (6000 amp.msq) |
| Visual Output | 1D soundings and 2D Sections for in-field QC, 2E fields and 2 H fields |
| Electric Sensors | Four Model BE26 Buffered , active high frequency dipole, 26m cable with four stainless steel electrodes |
| Magnetic Sensors | Two model BF1M Magnetic Field sensors (10 Hz to 100 KHz with 10m cable. Note Low frequency options available (0.1Hz to 1KHz) |
| ADC resolution | 18 bits |
| Power requirements | 1. Transmitter -12 VDC 2. Receiver Console and AFE - 12 VDC |
| Environmental | Temperature: -0 C to +50C Will operate below Zero but specifications not guaranteed |
| Shipping Weight | Approximately 200 kgs |
DataSheets
StrataGem Datasheet (PDF 1.2MB)
Electromagnetic Products
