The tTEM family
ATV towed land based
tTEM
The ATV towed tTEM delivers accurate and reliable data for use cases, including mapping groundwater, MAR, sand, and gravel deposits.
Conducting continous measurements, capturing data reaching depths of 180 m (590 ft). The tTEM geoscanner is operated via an Android or iOS app.
Configuration options.
221 Transmitter coil – 2 x 2 m, 1 turn – Maximum depth of investigation 130 m. Less depth of investigation as 331 but slightly better resolution in shallow subsurface. 2 x 2 m coil enables access to narrower driving tracks.
331 Transmitter coil – 3 x 3 m, 1 turn – Depth of investigation 130 m. This system is optimized for a large depth of investigation and high resolution of shallow layers.
333 Transmitter coil – 3 x 3 m, 3 turns – Depth of investigation 180 m. System provides a large transmitter moment but with slightly less resolution in the shallow subsurface compared to the 331.
Configuration not available
Cold weather surveys
SnowTEM
The SnowTEM delivers detailed mapping data in snow and ice. Suitable for permafrost, groundwater, sand, and gravel deposit mapping.
Conducting continuous measurements, capturing data reaching depths of 180 m (590 ft). The SnowTEM geoscanner is operated via an Android or iOS app.
Configuration options.
221 Transmitter coil – 2 x 2 m, 1 turn – Maximum depth of investigation 130 m. Less depth of investigation as 331 but slightly better resolution in shallow subsurface. 2 x 2 m coil enables access to narrower driving tracks.
331 Transmitter coil – 3 x 3 m, 1 turn – Depth of investigation 130 m. This system is optimized for a large depth of investigation and high resolution of shallow layers.
333 Transmitter coil – 3 x 3 m, 3 turns – Depth of investigation 180 m. System provides a large transmitter moment but with slightly less resolution in the shallow subsurface compared to the 331.
Configuration not available
Underwater surveys
FloaTEM
FloaTEM is the tTEM solution that delivers accurate and reliable data for mapping aquifers and investigating water bodies.
FloaTEM is an hydrogeophysical scanner for river and shallow sea bottom imaging. It enables aquatic geophysical surveys that deliver detailed imaging data.
Configuration options.
221 Transmitter coil – 2 x 2 m, 1 turn – Maximum depth of investigation 130 m. Less depth of investigation as 331 but slightly better resolution in shallow subsurface. 2 x 2 m coil enables access to narrower driving tracks.
331 Transmitter coil – 3 x 3 m, 1 turn – Depth of investigation 130 m. This system is optimized for a large depth of investigation and high resolution of shallow layers.
333 Transmitter coil – 3 x 3 m, 3 turns – Depth of investigation 180 m. System provides a large transmitter moment but with slightly less resolution in the shallow subsurface compared to the 331.
443 Transmitter coil – 4 x 4 m, 3 turns – Depth of investigation -Variable. Maximum transmitter moment designed for FloaTEM operation on freshwater/saltwater/brackish water.
Need help choosing the right instrument for your project or want to discuss your particular survey challenges?
Get to know the tTEM
The tTEM modular system comes in different configurations, enabling you to create an instrument that delivers the data you need for your specific project environment. Find out more about the various setups, discover the technical details, and learn how we support you and your instrument in delivering the best data for your projects.
tTEM
The tTEM geoscanner is designed to be towed by an All-Terrain Vehicle (ATV) / Quad bike to deliver high-resolution, subsurface layer images. The system can be configured with different sizes of transmitter coils by changing the length of the fiberglass beams (wings) carrying the coil.
Flexibility and adaptability.
This flexibility allows the system to adapt easily to survey requirements and field conditions. For example, if a survey requires a certain depth of investigation or needs to be carried out in tracks, a large coil with a maximum area can be mounted, or a smaller coil can be mounted that fits the width of narrower tracks.
Deep investigation, fast.
The tTEM enables surveys to 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 the configuration. The transmitter coil’s area directly affects the investigation depth, with a larger area resulting in deeper penetration. Increasing the number of turns also increases the depth of the investigation, but can come at the cost of losing resolution in the shallow subsurface.
SnowTEM
The SnowTEM geoscanner is designed to enable precise mapping of permafrost and taliks in remote and challenging landscapes. Researchers and environmental experts can explore pristine frozen terrains, extracting insights for climate studies, resource management, groundwater systems, and ecological preservation.
Exceptional versatility in frozen landscapes.
SnowTEM surveys in linear paths or full 3D scans and delivers subsurface imaging across applications. The system advances climate research by providing critical permafrost data, and climate change impacts on polar ecosystems can be accessed with this information. Accurate permafrost mapping is essential for designing stable and resilient infrastructure in regions prone to ground instability. SnowTEM can assist in identifying suitable construction sites and optimizing foundation designs.
Reliability built in.
SnowTEM is built on the tTEM’s reliable platform operated worldwide by companies and research institutions to provide high-quality data in challenging field conditions. The system’s robust design provides reliability and accuracy in challenging conditions, enabling a greater knowledge of the makeup of permafrost and taliks.
FloaTEM
FloaTEM is an advanced hydrogeophysical scanner for imaging river and shallow sea bottoms. The system enables aquatic geophysical surveys and delivers high-resolution, subsurface imaging while floating on water. It comes complete with two durable rubber boats for the transmitter and receiver platforms.
Built for freshwater and saltwater applications.
FloaTEM is built on the tried and tested tTEM system and has been adapted for use in freshwater. The specialized 443 coil configuration for saltwater applications is designed to increase system power and deliver accurate data. Adapted software scripts enable enhanced data collection. Built on the reliable and robust tTEM platform, FloaTEM provides the same high-quality data, versatility, and robustness.
Understanding underwater geology.
FloaTEM is built to map aquifers, investigate water bodies, and enhance our understanding of underwater geological structures. It can also characterize the interaction between the river and lake water bodies and the groundwater system or sea-bottom sediments below shallow saltwater.
The app controller
The tTEM system is managed by the user-friendly tTEM Controller app, which is available for both Android and iOS. You can install it easily from the Google Play or Apple App Store.
The connection process is straightforward. The tTEM Controller app connects directly to the Wi-Fi of the sTEM instrument. Delivering data from the receiver to the app is a simple process. The easy setup enables you to be up and running in the field quickly and efficiently.
In the app, you can see:
- Data curves as they are being collected
- System parameters
- System temperature
- Set the bearing
- Check the current for high and low moments
- Write field notes
Configuration options
The tTEM family of instruments can be configured for different use cases by adjusting the size of the transmitter coil. Four options are available. Three configurations are available for the tTEM and SnowTEM, with the fourth option available only for the FloaTEM.
Coil 331
Wing size 3 x 3 m
Turns – 1
Max depth of investigation [m] ~ 130
Characteristics – Standard system that optimized for large depth of investigation and high resolution of shallow layers.
Coil 333
Wing size – 3 x 3 m
Turns – 3
Max depth of investigation [m] ~ 180
Characteristics – System provides large transmitter moments but slightly less resolution in the shallow subsurface than the 331 system.
Coil 221
Wing size 2 x 2 m
Turns – 1
Max depth of investigation [m] ~ 130
Characteristics – The system has a similar depth of investigation as 331 but slightly less resolution in the shallow subsurface. Access narrower driving tracks with the 2 x 2 m coil.
Coil 443 – FloaTEM only
Wing size 4 x 4 m
Turns – 3
Max depth of investigation [m] Varies, dependent on salinity and water depth
Characteristics – A system with maximum transmitter moment designed for FloaTEM operation on freshwater/saltwater/brackish water.
Cable options
Different lengths of cables are available for use with side-by-side vehicles, larger quadbikes, snowmobiles, and UTVs.
Data processing
Data is processed using dedicated software and presented along cross-sections or on maps. Combining the information from the tTEM measurements with, for example, topography data or typical resistivities of the aquifer layers, an accurate hydrological image can be created, and well sites can be pinpointed.
Upgrades and updates
Any tTEM instrument can easily be converted from the land-based ATV towed version to a sled-pulled or dingy water-based system or vice versa.
Please contact our customer service team to learn more about the options to upgrade and convert a system to a different configuration.
Regular over-the-air firmware and software updates enable all tTEM systems to be up to date with the latest firmware and software.
Customer service
At TEMcompany, we are committed to providing our customers with a comprehensive support and training package. We can help with instrument issues, training, survey planning, data quality control, and interpreting results. Our team of experts is available to offer guidance and expertise, ensuring you gain maximum value from your TEMcompany instrument.
Quality training is an integral part of our business. For customers buying an sTEM, on-site training is unnecessary as the instrument setup is easy with our comprehensive online customer support. For tTEM customers, we deliver 3-day classes at your premises. We also offer one-day general TEM theory and interpretation courses at conferences.
We also offer an extended support package with unlimited survey design, data QC, and data processing support.
Need help choosing the right instrument for your project or want to discuss your particular survey challenges?
Your questions answered
What geophysical applications can I use an tTEM for?
The tTEM can deliver profiles for various geophysical applications.
Managed Aquifer Recharge.
Water is filtered into aquifers through wells or permeable areas, ensuring reliable supplies, reducing flooding, and supporting ecosystems during droughts.
Fractured Hard Rock.
Rain or runoff seeps into these fractures. Managing these aquifers ensures water for communities, agriculture, and industries, especially during dry periods.
Mapping Groundwater.
Accurate mapping helps manage water sustainably, supporting communities, agriculture, and industries in regions with limited water supplies.
Exploring Rivers.
Studying river water and groundwater interaction supports better resource management in river and estuary areas.
Saltwater Intrusion.
The tTEM can map saltwater boundaries in regions prone to flooding, rising seas, or artificially lowered groundwater levels.
Well Siting in Hard Rock.
The tTEM can help locate water-filled fractures, improving success for communities, agriculture, and industries.
Contaminated Areas.
The tTEM can help locate areas of pollution in soil and groundwater. Ensuring safe water for communities, agriculture, and industries in vulnerable regions.
Raw Materials.
Raw materials like minerals and metals can be located using the tTEM. Efficient identification promotes responsible resource management and sustainability.
Weathered Bedrock.
The tTEM can help locate these areas, supporting well drilling and sustainable water management in challenging environments.
Permafrost Mapping.
The tTEM can help determine permafrost depth and stability, supporting infrastructure planning and environmental protection in climate-sensitive regions.
How deep can I scan for with an tTEM system?
The investigation depth of each tTEM instrument can vary based on specific configurations, subsurface conditions, and survey requirements. Please get in touch with our support team for detailed specifications and to determine which system is most suitable for your project.
tTEM.
The adaptable tTEM delivers accurate data to depths of 150 m—200 m. It conducts single-site measurements and captures data up to 200 m (656 ft).
SnowTEM.
The SnowTEM 10 delivers accurate data to 200 m—500m depths. It conducts single-site measurements and captures data at depths between 200m (656 ft) and 500 m (1650 ft).
FloaTEM.
The FloatTEM delivers accurate data to 200 m – 600 m depths. Conducting single-site measurements, capturing data that reaches depths beyond 500 m (1650 ft).
Does it take long to learn how to use an tTEM?
Learning to use a tTEM instrument typically involves theoretical understanding and practical training. The time required to become proficient depends on your experience with geophysical equipment and data interpretation. The level of training and support from TEMcompany depends on your purchase agreement.
Here’s an approximate timing breakdown for getting to know the instrument and software:
Basic Training: 3 Days
- System Setup and Operation: Understanding how to assemble and calibrate the tTEM device.
- Data Acquisition: Learning how to perform field measurements effectively.
- Instrument Maintenance: Basic care and troubleshooting.
Intermediate Training: 1–2 Weeks
- Data Processing: Mastering our partner software, processing raw data, and creating resistivity models.
- Survey Design: Learning to design an efficient survey for your specific application (e.g., groundwater exploration or mineral prospecting).
- Hands-on Practice: Conducting field surveys to gain confidence.
Advanced Proficiency: 1–3 Months
- Interpretation Skills: Developing the ability to interpret processed data in various geological contexts.
- Customization: Adjusting instrument settings for unique survey requirements.
- Problem-Solving: Handling complex scenarios, such as interference or challenging terrain.
Support and Resources
TEMcompany typically offers:
- User Manuals: Comprehensive guides for setup and operation.
- Training Sessions: Workshops or online training programs.
- Customer Support: Direct assistance with troubleshooting and answering advanced questions.
If you already have experience with similar geophysical equipment, you will probably find it much quicker to get started. For beginners, the timeline above provides a realistic estimate.
Will a tTEM work in extreme temperatures?
The tTEM instrument is designed to operate in various environmental conditions, including extreme temperatures. However, its performance depends on the specific operating temperature range. Here’s what to consider:
Operating Temperature Range
Most geophysical instruments, including tTEM, are built to function in environments from -20°C to +50°C (-4°F to +122°F). This range typically covers extreme cold and heat encountered in fieldwork. Some models may have extended temperature tolerances, especially if designed for specific conditions like permafrost or desert environments.
Performance Considerations
Cold Environments:
- Battery life may be reduced in low temperatures. Carrying spare, insulated batteries is advisable.
- Electronics may require a brief warm-up period to stabilize.
- Ensure cables and connectors remain flexible and do not become brittle.
- Ensure the coolant does not freeze, as it may cause damage to the instrument.
Hot Environments:
- Prolonged exposure to direct sunlight can increase internal temperatures. Use shade or reflective covers when possible.
- Overheating protection mechanisms may temporarily shut down the instrument to prevent damage.
Moisture and Dust:
- Most instruments are built to withstand moderate exposure to dust and humidity with IP ratings (Ingress Protection) that ensure functionality in challenging conditions.
- Extreme environments like rain, snow, or high humidity may require additional protective measures.
Recommendations
Field Preparation: Understand your site’s specific environmental conditions and prepare accordingly (e.g., extra insulation for extreme cold or cooling strategies for heat).
Protective Gear: Use weatherproof cases and covers for the instrument during extreme weather.
Check the tTEM user manual for detailed technical specifications and operating guidelines for a more precise answer. If you need more help, contact our support team for guidance tailored to your specific operating conditions.
Can you help me to choose the right tTEM configuration?
Yes, of course. We are committed to providing you with extensive information about our instruments and how they can deliver the best results for your project.
Our support team comprises highly qualified, experienced geophysicists with practical field knowledge from delivering geophysical data for projects worldwide.
Let us help you make the right decision.
Field tested and trusted
What professionals say about our geophysical scanners
Professionals worldwide rely on TEMcompany’s geophysical scanners for their reliability and accuracy in challenging environments. From mapping groundwater in arid regions to identifying subsurface layers beneath frozen terrains, customers choose TEMcompany’s instruments for their ease of use, portability, and robust performance. Whether used by NGOs, consultants, contractors, or researchers, TEMcompany’s instruments are recognized as an integral part of today’s complex subsurface exploration and environmental assessment landscape.
Need help choosing the right instrument for your project or want to discuss your particular survey challenges?
Why use TEM technology?
Our TEM technology
The Transient Electromagnetic (TEM) geophysical survey method is a modern technique designed to measure vertical resistivity profiles with particular sensitivity to conductive materials.
- Particularly sensitive to conductive materials
- Non-invasive method using wire loops to transmit and receive signals
- Leaves no trace on the survey site after data collection
- Highly efficient, requiring a transmitter loop and one or two smaller receiver coils
- Can achieve depth measurements of up to 600 meters
- Entire process takes only a few minutes, from setup to resistivity modeling
Where to use TEM
TEM surveys are highly versatile and are particularly effective in the following areas. Our instruments deliver accurate, fast data to solve many geophysical challenges.
Groundwater Exploration: Identifies freshwater reserves, saline water, and contamination zones to optimize well placement and drilling depth.
Mineral Detection: Locates mineral deposits based on their unique resistivity signatures.
Geological Mapping: Reveals the subsurface structure for various geological studies.
Environmental Surveys: Assesses contaminants and salination in the soil.
The benefits of TEM
Transient Electromagnetic (TEM) mapping is a non-invasive method that ensures that survey areas remain undisturbed, as it uses wire loops to transmit and receive electromagnetic signals without leaving physical marks on the terrain.
TEMcompany geoscanners enable fast, accurate geophysical data collection alongside easy instrument setup, delivering significant time savings for consultants, contractors, and clients.
