Geophysics Time-Domain/Transient Electromagnetics (TDEM/TEM) Equipment Geophysical Tool

• Customization: Available
• Accuracy: Tem Equioment
• Horizontal Line: Transient Electromagnetic Equipment
• Model NO.: WTEM
• Vertical Lines: Transient Electromagnetic Equipment
• After-Sales Service: Provide
• Warranty: 1 Year, 1 Year
• Touch Screen Resolution: Tem Transient Electromagnetic Equipment
• Humidity: Tem Transient Electromagnetic Equipment
• Data Storage: Tem Transient Electromagnetic Equipment
• Channel: Tem Transient Electromagnetic Equipment
• Frequency: Tem Transient Electromagnetic Equipment
• Power Frequency Suppression: Tem Transient Electromagnetic Equipment
• Detection Depth: Tem Transient Electromagnetic Equipment
• Main Amplification Gain: 1, 2, 4, 8, 16, 32, 64, 128 Times
• Band-Pass: 0~50K Hz (Liner Phased Filter), Full Band-Pass 0~4
• Synchronization Mode: Cable Synchronization, GPS Synchronization
• Applications: Geological Study, Groundwater, Tunnel, Mining
• Function: Tem Exploration
• Usage: Tem Transient Electromagnetic Equipment
• Transport Package: Standard Export Plywood Case
• Specification: CE, SGS, ISO9001
• Trademark: Gold
• Origin: Chongqing, China
• HS Code: 9015800090
• Production Capacity: 100 Sets Per Month

Product Description

Geophysics Time-Domain/Transient Electromagnetics (TDEM/TEM) Equipment Geophysical Tool

Product Description

 

Transient electromagnetic method (TEM) is also called Time domain electromagnetic Method (TEM). It transmits a electromagnetic pulse into the ground by using an ungrounded loop or ground wire source. During the interval of the magnetic pulse, a coil or ground electrode is used to observe the secondary eddy current field. 
Simply put, the fundamental principle of TEM is the law of electromagnetic induction. The decay process is generally divided into early, middle and late stages. The early electromagnetic field is equivalent to the high-frequency components in the frequency domain, which attenuates quickly and has a small skin depth. While the late component is equivalent to the low frequency component in the frequency domain, slow attenuation, large skin depth. The geoelectric characteristics of different depths can be obtained by measuring the change law of secondary field with time in each time period after power failure.

Application of Geophysics Time-Domain/Transient Electromagnetics (TDEM/TEM) Equipment Geophysical Tool
 

1. Surface detection of aquifers, fault water bearing, coal seam structure and subsidence
2. The water storage structure inside and outside the mining area and in front of the header is detected downhole
3. To detect the depth and occurrence of good conductive ore body, and to detect the structure of ore accumulation
4. Detect the old kiln and its water content
5. Engineering exploration and environmental exploration
6. Oil and gas exploration and so on

Standard configuration of WTEM-2 Geophysics Time-Domain/Transient Electromagnetics (TDEM/TEM) Equipment Geophysical Tool

1. WTEM-2J TEM Exploration System Receiver
2. WTEM-1D 10kw High-Power Transmitter
3. WTEM-2T/GPS Transmitter Synchronized Controller
4. Pocket PC (PDA) to control the TEM system receiver and the system.

Optional instruments:

1. PTT-40A Antenna & Adapter

Technical Specifications of Geophysics Time-Domain/Transient Electromagnetics (TDEM/TEM) Equipment Geophysical Tool
 

Transmitter
Transmitting voltage	≤200V
Transmitting current	≤50A
Current measurement precision	current range before power supply being cut off is 0~50A, display resolution is 0.01A.
Power supply frequencies	0.0625Hz, 0.125Hz, 0.25Hz, 0.5Hz, 1Hz, 2Hz, 4Hz, 8Hz, 16Hz, 32Hz
Transmitting waveform	+ON, OFF, -ON, OFF, equal width and dual polarity
Turn-off delay time	1μs~1000μs
Turn-off time	≤1.2μs (pure resistance), changing with the transmitting current and transmitting coil when connecting to the coils
Damping resistance	1000Ω
Transmitting coil	0.1km×0.1km single turn ~ 2km×2km single turn
Synchronization mode	external synchronization (cable, GPS)
Power supply	internal 12V8.6Ah rechargeable battery (or external 12V power supply) lasting for over 10 hours
Dimension	525×436×217mm 3
Weight	18.5kg
Working temperature	-10°C~+50°C
	Receiver
Number of channel	1
Pre-amplification gain	8, 32 times
Main amplification gain	1, 2, 4, 8, 32, 64, 128 times
Band-pass	0~50k Hz (liner phased filter), full band-pass 0~400k Hz
Suppression	80dB
A/D	16 bit
Min sample interval	1μs
Trace number	≤128
Stacking times	1~9999 time
Synchronization mode	internal 12V9.6Ah rechargeable battery (or external 12V power supply) lasting for over 10 hours
Pocket PC	Windows Mobile 6.0 system with software such as Word, Excel, etc., 320x240 true color, 64MB Flash Rom/ 64MB SDRAM/64MB 2GB CF card, able to store over 200,000 readings of sampled data,2 original rechargeable batteries
Ports	Bluetooth, infrared and serial port
Dimension	340×295×152mm
Weight	5.3kg
Working temperature	-10°C~+50°C

Main Functions and Features of Technical Specifications of Geophysics Time-Domain/Transient Electromagnetics (TDEM/TEM) Equipment Geophysical Tool

1. All-round optimization of WTEM-2J receiver: Except for the power switch, all operations are carried out in pocket PC through Bluetooth.
2. Improved WTEM-2T/GPS transmitter synchronized controller: a better GPS module and antenna with higher sensibility, faster in synchronization speed, compacter in size and lighter in weight.
3. Support several synchronization mode: 
   1. 1.  cable synchronization
      2.  GPS synchronization
      3.  "GPS + Clock" synchronization (optional)

When GPS satellite signal is very weak or disappears, the quartz crystal will perform synchronization with error less than 1μs/hour.

The latter two synchronization modes require a WTEM-2T/GPS synchronized controller. Once start up, it only takes no more than 2 minutes to get the transmitter and the transmitter synchronized if satellite signal is good.

1. High reliability, low power consumption: refined receiver and circuitry, sealed and rugged mechanical structure, ensuring high reliability, low power consumption and convenient operation.
2. Wide range of sounding depth: WTEM-1D transmitter can help to perform medium-deep or deep exploration in tens of meters to thousands of meters.
3. Remote control: pocket PC and Bluetooth wireless communication technology enable to operate the WTEM-2J receiver in 10 meters, such as setting up parameters, starting measuring, transferring and displaying the measured results.
4. High anti-interference performance: program controls the filter to give accurate power supply frequency; besides, data stacking and software filtration also do good to this performance.
5. Multiple channels, high measurement accuracy: operator could set number of channel, linear or logarithmic; crystal oscillator accomplishes timing, with stable and precise time-to-depth ratio. Sampling window arrangement is reasonable, imaging the true subsurface structure. It provides references to complex geological problems.
6. Short turn-off time: transmitter support swift turn-off function, able to extend shallow exploration range. Short turn-off function provides software with accurate turn-off time to enable it to give accurate data.

Advantages of Geophysics Time-Domain/Transient Electromagnetics (TDEM/TEM) Equipment Geophysical Tool

Non-invasive Method: TEM is a non-invasive geophysical technique, meaning it does not require drilling or extensive excavation. This is particularly advantageous in environmentally sensitive areas or regions where access is limited.
High Spatial Resolution: TEM equipment provides high-resolution data, enabling detailed imaging of subsurface structures. This makes it possible to detect smaller anomalies that might be missed by other geophysical methods.
Deep Penetration: TEM can probe deep into the Earth, often reaching depths of several hundred meters. This makes it suitable for exploring large-scale geological features and deep-seated mineral or water deposits.
Rapid Data Acquisition: Unlike some traditional geophysical techniques, TEM can provide fast data collection and processing. The transient nature of the signals means that multiple measurements can be taken quickly, making it suitable for large-area surveys.
Cost-Effective: TEM surveys are often more cost-effective than other geophysical methods, particularly when deep or large-scale investigations are required. The ability to cover extensive areas with relatively few measurements further contributes to its cost efficiency.
Minimal Environmental Impact: Since TEM surveys are non-invasive and do not require substantial land disruption, they have minimal environmental impact compared to traditional exploration methods, such as drilling.