Efficient subsurface imaging with tTEM

The tTEM Geoscanner

Revolutionary Groundwater Mapping

The tTEM geoscanner revolutionizes land-based groundwater mapping. It is designed to be towed by an All-Terrain Vehicle (ATV) / Quad bike to create high-resolution subsurface layer images. The system can be configured with different sizes of the transmitter coil by changing the length of the fiberglass beams (wings) carrying the coil. This makes it possible to easily adapt the system for specific survey requirements and field conditions, if a survey requires a certain depth of investigation, a large coil with maximum area can be mounted. Or if a survey needs to be carried out in tracks, a smaller coil which fit the width of the tracks can be mounted.

Surveys cover areas from tens to thousands of hectares (2 – 2000 acres), with a depth of investigation ranging from a meter or two below the surface to an impressive 180-200 meters (600 – 650 feet) depending on configuration. The area of the transmitter coil directly affects the depth of investigation, with larger area resulting in deeper penetration. Increasing the number of turns also increases the depth of investigation but it comes at the expense of losing the very shallow layer resolution.


The tTEM system comes with:

  • 331: 3×3, single turn. 3 m wide
    The default tTEM system
  • 333: 3×3, three turns. 3 m wide
    Deeper investigation than 331, but less focus on shallow layer resolution.
  • 222: 2×2, two turns. 2 m wide
    Same depth of investigation as 331.
    Because of the smaller width it can access fields with narrow driving tracks.

Unparalleled Coverage and Versatility

The tTEM geoscanner allows surveys along lines or in full 3D, offering comprehensive coverage. It enables detailed imaging of subsurface features, making it invaluable for various applications. Pinpoint new well locations, explore hydrogeological mapping in 3D, and more with the tTEM geoscanner’s exceptional results.
Superior Data Quality

Our tTEM geoscanner leverages advanced electronics, microcontrollers, and computers for maximum potential. It withstands challenging field conditions while delivering high-quality data. The instrument’s craftsmanship and robust design ensure reliability and accuracy in measurements.

Key Technical Details tTEM:

  • Driving speed: up to 20 km/h (12 miles/h)
  • Depth of investigation: up to 130 m (430 feet) or 180 m (600 feet) depending on configuration
  • Power supply: 12 V lithium battery
  • Pulse frequency: 2000 Hz for low moment (3 Amp) and 630 Hz for high moment (30 Amp)
  • First gate centered in 4 microseconds from the beginning of the current turn-off on low moment.
  • Wi-Fi and internet-enabled for remote support and data upload

I’ve been waiting for a system like this for years and the tTEM has exceeded all my expectations!

Justin RittgersGeophysicist, United States Bureau of Reclamation
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