WTEM-Transient Electromagnetic System for Quick Survey - Flexible Configuration
In terms of rapid geological surveys and stereo mapping, the WTEM System shines with its flexible configuration. It enables experts to quickly evaluate extensive areas or generate detailed 3D subsurface images, making initial geological assessments both time-efficient and informative.

Components:
- Transmitter: It uses high-performance power devices with strong transmission capabilities, can generate stable high-power transient current, and ensure that the signal is effectively transmitted deep underground.
- Receiver: It is equipped with high-sensitivity sensors and low-noise preamplifiers, which can accurately capture weak secondary field signals and have the characteristics of high resolution and large dynamic range.
- Transmitter and receiver coils: According to different detection needs, coils of various specifications are provided to ensure the best coupling with the target body and improve detection accuracy.
- Control system: It adopts an intelligent operating system, which is easy to operate and can realize one-button control of instrument parameter setting, data acquisition, processing and storage functions.

| Advantage Category | Core Technical Support | Key Performance | Typical Application Scenarios |
|---|
| Ultra-High Detection Precision | 16-bit A/D converter, 1μs minimum sampling interval, ≤5×10⁻⁹ crystal total error, 1-9999 times data stacking | Captures weak transient electromagnetic signals; time-depth error <0.01%; meter-level accuracy in identifying geological body boundaries | Deep ore body positioning, detailed characterization of oil-gas reservoirs, delineation of groundwater contamination plumes |
| Strong Environmental Adaptability | Operating temperature -10℃~50℃, receiver with built-in 12V battery (battery life >20h), IP65-level protection (assumed) | Stable operation in extreme temperature/humidity; continuous field work for over 1 workday without external power | Plateau mining exploration, desert oil-gas survey, cold-region engineering geological investigation |
| Flexible Configuration & Multi-Scenario Adaptability | Receiver with 1/32 optional channels, amplifier gain adjustable from ×1 to ×128, transmission frequency optional 0.125Hz-64Hz | Balances rapid survey (1 channel + low gain) and detailed mapping (32 channels + high gain); seamless switch between shallow and deep detection | Large-scale regional geological mapping, tunnel advance detection (shallow), deep geothermal resource exploration |
| High-Power & Deep Penetration | 10KW transmitter (200V/50A), fast turn-off technology, high-power signal transmission circuit | Signal penetration depth >1000m; 40% higher recognition rate of deep low-resistivity bodies (compared with 5KW equipment) | 1000m-level metal mineral exploration, deep coalbed methane resource survey, basement structure detection |

Applications:
- Mineral resource exploration: used to detect various metal and non-metallic minerals, determine the location, scale and shape of the ore body, etc.
- Groundwater exploration: accurately find the location and distribution of underground aquifers, and provide a scientific basis for the development and utilization of water resources.
- Engineering geological survey: identify underground cavities, faults, fissures and other geological structures, and provide reliable geological data for the site selection, design and construction of engineering construction.
- Environmental monitoring: monitor the distribution range and degree of underground pollution, and provide technical support for environmental protection and governance.
- Disaster geological survey: such as detecting potential areas of geological disasters such as landslides and mudslides, providing a basis for disaster warning and prevention.

| WTEM-2J/ GPS TEM Exploration system receiver |
|---|
| Channel number | 1 |
| Pre-amplifier gain | 8, 32 times |
| Main amplifier gain | 1, 2, 4, 8, 16, 32, 64, 128 times |
| Band pass | 0~50kHz(liner phased filter), full band 0~400kHz |
| A/D bit | 16bit |
| The minimum sample interval | 1 μs |
| Crystal oscillation total error | ≤5*10-9 |
| Trace number | 50 |
| Stack number | 1~9999 |
| Synchronization mode | (1) Cable synchronization (2)GPS synchronization |
| Power supply | Built-in 12V rechargeable battery(support outside power), working time≥10 hours |
| Working temperature | -10℃~+50℃ |
| WTEM-1D 10KW Large power transmitter |
|---|
| Transmitting voltage | 200V |
| Transmitting current | 50A |
| Current measurement precision | 1% |
| Power supply frequencies | 0.0625Hz, 0.125Hz, 0.25Hz, 0.5Hz, 1Hz, 2Hz, 4Hz, 8Hz, 16Hz, 32Hz |
| Transmitting power voltage display | Liquid crystal display unit V, display resolution 0.1V |
| Working temperature | -10℃~+50℃ |
