GT-30 Geotech addresses high-resolution shallow exploration needs. Through a small-size loop and fast switch-off technology, it achieves continuous full-depth detection from the surface down to several tens of meters, with an extremely small blind zone.
Coplanar equal-flux oppositely-polarized integrated transceiver coil; the forward and reverse primary fields cancel inside the receiving coil, forming a zero-flux zone.
Manufactured as a single piece from high-strength non-metallic material; the primary field cancels by itself, and changing the device size adapts it to different depths.
Can be paired with different coils, covering coal-mine explosion-proof environments, tunnel advance prediction, and surface detection.
Downhole and tunnel full-space interpretation software system with one-click filtering and one-click mapping; data is uploaded, saved, interpreted, and mapped in real time.
| Parameter | Receiver Module | Parameter | Transmitter Module |
|---|---|---|---|
| A/D Converter | 32-bit | Transmitter Voltage (V) | 36-57 |
| Dynamic Range | 160dB | Transmitter Current (A) | ≥150 |
| Sampling Rate | 1μs、4μs、16μs | Current Pulse Width (ms) | 10、20、40 |
| Number of Acquisition Channels | 2 | Transmitted Waveform | Bipolar square wave with a 1:1 duty cycle |
| Background Noise | 1μV | Maximum Transmitter Power (kW) | 8.5 |
| Voltage Measurement Range | -200V-200V | Synchronization Method | Cable synchronization |
| Voltage Measurement Resolution | ≤300nV | Turn-off Time | 0.5–300 μs, depending on the supply current and transmitter coil |
| Measurement Accuracy | 0.001 | Computer System | Windows-based operating interface |
| Input Gain Range | 1/80-8000 | Data Interface | USB2.0 |
| Minimum Sampling Interval | 4μs | Storage Capacity | ≥30,000 measurement points |
| Noise Suppression | >100dB | Dimensions (L × W × H) | 403mm×330mm×178mm |
| Frequency Bandwidth | 0-500kHz | Weight | 8kg |
| Stacking Times | 1~200 | Operating Temperature | -10℃-50℃ |
| Parameter Category | GT-30 |
|---|---|
| System Positioning | Shallow-depth TEM system using a coplanar, equivalent anti-flux configuration for blind-zone-free ultra-shallow detection |
| Standard Transmitter Loop Specification | Integrated transmitter-receiver anti-flux coil with a coplanar, equivalent anti-flux configuration; no separate transmitter loop |
| Standard Receiver Probe / Coil | Integrated receiver coil with built-in primary-field compensation, arranged coplanarly with the transmitter coil |
| Common Survey Configuration | Coplanar equivalent anti-flux configuration |
| Compatible Transmitter Current | Compatible with high-current operation (≥150 A), combining high-resolution shallow detection with deeper investigation |
| Typical Applications | Shallow subsurface surveys, karst detection beneath roadbeds and foundations, engineering seepage investigations, and urban geophysical surveys (minimum detection depth: 1 m; maximum: 200 m) |
| Design Features | Compact, lightweight integrated coil designed to suppress the primary-field blind zone |
The standard kit is designed for field transport and routine survey setup. Actual contents may vary by model and order configuration.
Integrated Transmitter-Receiver Unit × 1
Industrial Tablet PC × 1
Ground TEM Probe × 1
Ground TEM Probe Connection Cable × 1
Transmitter Loop × 1
Anti-Flux Coil × 1
Anti-Flux Coil Connection Cable × 1
| Name | Model | Material Code |
|---|---|---|
| GT-30 Standard Kit | GT-30 Kit | M0.0011 |
| Transient Electromagnetic Instrument | GT-30 | M0.2003 |
| Industrial Tablet PC (including Network Cable) | ONERugged | M6.0001 |
| Anti-Flux Coil | T-30 | M4.2004 |
| Anti-Flux Coil Connection Cable | T-31 | M6.0016 |
| Processing Software (including USB Dongle) | TEM Processing Software | M5.1010 |
| TEM Backpack Harness | Dual-Shoulder | M6.0006 |
| Ground TEM Probe Connection Cable | T-11 | M6.0014 |
| TEM Charger | CDQ-5 | M4.1005 |
| Tablet PC Charger | CDQ-6 | M4.1006 |
| Ground TEM Probe | T-10 | M4.2001 |
| Transmitter Loop | 6 mm² × 40 m | M4.2002 |
