WTEM-2 Deep Transient Electromagnetic System

WTEM-2 Medium-Deep/Deep Time Domain TEM Exploraiton System is applicable to medium-deep/deep transient electromagnetic sounding exploration. It features high power, short turn off time, high reliability, strong anti-interference performance, lightweight and low power consumption. The system composed of WTEM-2J TEM Exploration System Receiver, WTEM-2D/60 High-power Transmitter, WTEM-2T/GPS Transmitter Synchronized Controller, the PTT-40A Antenna & Adapter and one Touch pad.

According to different geological situations, user could choose an appropriate system to finish surveying tasks of quick general survey, 3D graph coloring up, deep mine finding. It is mainly used for surveying metal mine, coal-mine, oil and gas field, geothermal field, and applies in hydrology and engineering geological prospecting as well.

Standard configuration of WTEM-2 system:

*  WTEM-2J Receiver
*  WTEM-2D/60 Transmitter
*  WTEM-2T/GPS Transmitter Synchronized Controller
*  Touch pad to control the TEM system

Optional instrument:
*  PTT-40A Antenna & Adapter




* WTEM-2 Catalogue

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Whatsapp:0086 15986731215


Main  features:

•   Improved WTEM-2T/GPS transmitter synchronized controller: a better GPS module and antenna of higher sensibility is integrated, faster in synchronization speed, compacter in size and lighter in weight.
•   High reliability, low power consumption: refined receiver and circuitry, sealed and rugged mechanical structure, ensuring high reliability, low power consumption and convenient operation.
•   Remote control: it is the first receivers that take use of a pocket PC and Bluetooth wireless communication technology which enable it to control the WTEM-2J receiver 10 meters, such as setting up parameters, starting measuring, transferring and displaying the measured results.
•   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.
•   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.
•   Friendly and powerful control interface: PDA control and collects data from human-machine interface, such as parameters input, data display or storage, graph plotting, etc, simplifying fieldwork.

Technical specification:

WTEM-2D/60 Transmitter  
Transmitting voltage 12V~200 V DC
Transmitting current ≤60A
Current measurement precision ±1%
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 160ns (Pure resistance load)
Damping resistance 1000Ω
Transmitting coil 0.1km* 0.1km single turn ~ 2km*2km single turn
Synchronization mode external synchronization (cable, GPS, Quartz clock)
Power supply internal 12V8.6Ah rechargeable battery (or external 12V power supply) lasting for over 8 hours
Dimension 486 * 392 * 192 mm
Weight 12.7kg
Working temperature             -10°C~+50°C

WTEM-2J Receiver
Number of channel 1
Pre-amplification gain 32 times
Main amplification gain 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 cable, GPS, GPS+quartz clock
Power source internal 12V rechargeable battery (or external 12V power supply) lasting for about 16 hours work
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 340mm* 295mm *152mm
Weight 5.3kg
Working temperature              -10℃~+50℃

WTEM-2T/GPS Transmitter Synchronized Controller
- Fast synchronization.
- Synchronization accuracy is high, synchronization error is less than 250ns.
- Supports multiple control signal frequencies.
- Real-time satellite signal display.
Power source Built-in high-capacity lithium battery, working time ≥ 20 hours.
Volume 270mm * 246mm * 123mm
Weight 2.5kg


Tansmitting System of WTEM-2 GPS TEM system
( 12v car battery is not in standard configuration)

1200m depth TEM apparent resistivity pseudosection for geothermal inverstigation in Tengchong of Yunnan