Sales Products :: Electromagnetic
Geonics EM-34-3
The EM34-3 is a fast, simple to operate, cost-effective instrument for the engineering geophysicist, geologist and hydro geologist alike and has been particularly successful for mapping deeper groundwater contaminant plumes and for groundwater exploration.
Using the same patented inductive method as the EM31, the EM34-3 uses 3 inter-coil spacings to give variable depths of exploration down to 60 meters. With the 3 spacings and 2 dipole modes (horizontal coplanar as shown and vertical), vertical electrical soundings can be obtained. In the vertical dipole (horizontal coplanar) mode the EM34-3 is very sensitive to vertical geological anomalies and is widely used for groundwater exploration in fractured, faulted and weathered bedrock zones..
In regions of particularly high cultural and atmospheric noise the higher powered EM34-3XL improves the signal to noise ratio by a factor of 10 at the 40 m spacing and by 4 at the 10 m and 20 m spacing.
In regions of particularly high cultural and atmospheric noise the higher powered EM34-3XL improves the signal to noise ratio by a factor of 10 at the 40 m spacing and by 4 at the 10 m and 20 m spacing.
The EM34-3 comes complete with an output connector for digital data logging with the Allegro CX as well as input ports which can be used with a rechargeable battery option.
Technical Specifications
| Measured Quantities | Apparent conductivity in millisiemens per metre (mS/m) |
| Primary Field Source | Self-contained dipole transmitter |
| Sensor | Self-contained dipole receiver |
| Reference Cable | Lightweight, 2 wire shielded cable |
| Inter-coil Spacing Operating Frequency |
10m at 6.4 kHz 20m at 1.6 kHz 40m at 0.4 kHz |
| Power Supply | Transmitter: 8 disposable or rechargeable 'D' cells Receiver: 8 disposable or rechargeable 'C' cells |
| Conductivity Ranges | 10, 100, 1000 mS/m |
| Measurement Resolution | +/- 0.1% of full scale |
| Measurement Accuracy | +/- 5% at 20 mS/m |
| Noise Levels | 0.2 mS/m (can be greater in regions of high power line interference) |
| Dimensions | Receiver Console: 19 x 13.5 x 26 cm Transmitter Console: 15.5 x 8 x 26 cm Receiver & Transmitter Coil: 63 cm dia. Shipping Case: 27.5 x 75 x 75 cm |
| Weight | Instrument: 20.5 kg Shipping: 43 kg |
Electromagnetic Products
