The sTEM family
Deep
sTEM5
The sTEM5 delivers accurate data to depths of 150 m – 200 m.
Conducting single-site measurements, capturing data that reaches depths up to 200 m (656 ft). Our most affordable entry level sTEM geoscanner is operated via an Android or iOS app.
Configuration options
Transmitter coil size – 20 m x 20 m
Transmitter coil size – 40 m x 40 m
Configuration not available
Configuration not available
sTEMprofiler – 3 m x 3 m
Deeper
sTEM10
The sTEM10 delivers accurate data to depths of 200 m – 500 m.
Conducting single-site measurements, capturing data reaching depths between 200 m (656 ft) and 500 m (1650 ft). The sTEM10 geoscanner is operated via an Android or iOS app.
Configuration options
Transmitter coil size – 20 m x 20 m
Transmitter coil size – 40 m x 40 m
Transmitter coil size – 80 m x 80 m
sTEMprofiler compact – 1.65 m x 1.65 m
sTEMprofiler – 3 m x 3 m
Deepest
sTEM20
The powerful sTEM20 delivers accurate data to depths of 200 m – 600 m.
Conducting single-site measurements, capturing data that can reach depths beyond 500 m (1650 ft). Powerful and accurate, the sTEM20 geoscanner is operated via an Android or iOS app.
Configuration options
Transmitter coil size – 20 m x 20 m
Transmitter coil size – 40 m x 40 m
Transmitter coil size – 80 m x 80 m
sTEMprofiler compact – 1.65 m x 1.65 m
sTEMprofiler – 3 m x 3 m
Need help choosing the right instrument for your project or want to discuss your particular survey challenges?
Get to know the sTEM
The sTEM modular system comes in different configurations and power levels, enabling you to configure a system that delivers the data you need for your geophysical project. Find out more about the different setups, discover the technical details, and learn how we support you and your instrument in delivering the best data for your projects.
- sTEM overview
- Central coil system
- Profiler system
- App controller
- Power options
- Data
- Upgrades
- Customer support
sTEM overview
The sTEM system maps subsurface geological layers, making it ideal for locating new groundwater wells and estimating the extent of aquifers and groundwater recharge potential.
The sTEM can also be used to locate large fractures in the bedrock and estimate the thickness of a weathered overburden. Mapping surface layers to identify the best sites for artificial infiltration of surface water into aquifers is another use of the sTEM.
The system is designed for ease of use and requires limited training for a field crew. All sTEM instruments are operated from an iOS or Android App, and data is processed on a Windows PC.
Central coil system
The sTEM can be supplied with different coil configurations, allowing surveys to be optimized according to field conditions and the target depth of investigation. The sTEM system has three transmitter coil sizes: 80 m x 80 m, 40 m x 40 m, and 20 m x 20 m. The standard coil is 40 x 40 m.
Each coil is designed to transmit maximum current with one of the sTEM systems. The receiver is placed in the transmitter’s center. An sTEM measurement is achieved by rolling out the transmitter and receiver coils in two squares and measuring for a few minutes.
A typical day’s production is 15 – 20 stations per day for a field crew of 2 people. The distance between the stations is typically 250 m, covering more than 1 km2 or about 100 hectares per day. The investigation depth depends on the geological layers’ overall resistivity, system power, and coil size.
Profiler system
The sTEMprofiler and the sTEMprofiler compact make mapping aquifers, artificial infiltration sites, and tailing dams easy. The profiler system is the fast, simple solution to collecting high-quality resistivity data for groundwater and environmental surveys. Measure for 30 seconds, grab the transmitter and receiver rigs, move 10 m or 20 m forward, and repeat. A two-person team can collect several km of densely measured profiles a day up to a depth of 100 – 150 m (300 – 450 ft).
The sTEMprofiler’s light weight makes navigating rough, steep terrain straightforward. The system is supplied with transport cases, making the sTEMprofiler easy to transport to the field and check-in as airplane luggage. It is operated from Android and iOS apps and has battery power for hours of operation. A team of 2-3 people can easily be trained to collect accurate data across challenging environments.
The sTEMprofiler is available for sTEM5, sTEM10, and the sTEM20.
The sTEMprofiler compact is available for sTEM10 and sTEM20.
The app controller
The user-friendly sTEM Controller app manages the sTEM system. It is available for Android and iOS and can be easily installed from the Google Play or Apple App Store.
The connection process is straightforward. Connect your phone to the sTEMs wifi and use the controller app to control the instrument. Remember to turn off your mobile data network to prevent automatic switching. Once you open the app, the controller interface will be displayed, and you can check the quality of your data as you measure. The easy setup enables you to be up and running in the field quickly and efficiently.
Power options
The sTEM system has three power options: 5, 10, or 20 amps. Small, lightweight batteries deliver the power; the 5 Amp and 10 Amp versions use two batteries, and the powerful sTEM20 uses three. You might consider extra batteries for remote field work or projects in extreme conditions.
The size of the transmitter loop also varies, starting with a lightweight 20 m x 20 m loop, the standard 40 m x 40 m loop, and the larger 80 m x 80 m loop. With the large loop investigations, a depth of beyond 500 m can be seen.
Data processing
Data is processed using dedicated software and presented along cross-sections or on maps. Combining the information from the sTEM measurements with, for example, topography data or typical resistivities of the aquifers can give a better hydrological understanding of the subsurface. This information can then be used for pinpointing well sites.
Upgrades
The sTEM instrument can easily be upgraded from 5 Amps to 10 Amps with an over-the-air firmware upgrade.
This enables a doubling of the signal-to-noise ratio, allowing you to image deeper.
The sTEM5 and sTEM10 units can be upgraded to sTEM20 by firmware and hardware upgrades requiring a return to manufacturer.
Please ask us about the exact costs for any combination of software, power, and transmitter coils.
Customer support
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 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?
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, our 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?
Take a closer look
LOW COST, HIGH IMPACT
The sTEM5.
Dual moment system
Low moment current – 1 Amp
High moment current – 5 Amp
Number of Rx channels – 1
Power – (14.4 V, 6.8 Ah, 99.4 Wh) 2 batteries
Tx loop options – 20×20 m, 40×40 m
Waveform recording – Pre-recorded
Control app – iOS, Android
Pulse on/off times – Pre-defined
LM On-time/Off-time – 46%/54%
HM On-time/Off-time -30%/70%
Service and upgrades – Via Internet
The sTEM Controller App is available for both iOS and Android.
sTEM5 KEY FEATURES
- Power Output: The sTEM5 enables subsurface investigations, reaching depths beyond 200 meters (approximately 656 feet).
- Dual Moment System: This feature allows the instrument to gather data from shallow and deep subsurface layers into a single measurement.
- Integrated Design: Combining transmitter (Tx) and receiver (Rx) electronics into a single unit enhances portability and ease of use.
- Transmitter Loop Sizes: The system accommodates various loop sizes – 20×20 m and 40 x 40 m, allowing flexibility based on survey requirements and desired depth penetration.
- Active Current Regulation: Maintains consistent current levels during measurements, ensuring data accuracy and reliability.
- Auto sign flip: In central loop configuration, the sTEM activates an auto sign flip, so it is not dependent on which direction the transmitter coil is rolled out and connected.
- Portability: The 20 m x 20 m sTEM5 weighs approximately 15 kg (33 lbs), including transmitter and receiver coils. It is designed for field portability and can be transported as check-in luggage, facilitating ease of deployment in various locations.
- App-controlled user interface: Operated via an intuitive Android or iOS application.
- Connectivity: Equipped with Wi-Fi and internet capabilities, the sTEM5 allows seamless data upload and remote support, enhancing operational efficiency.
Want to know more about the pricing and flexibility of the sTEM5? Contact our team of experienced geophysicists to discuss how we can help you deliver the best possible data for your project.
ADAPTABLE AND ACCURATE
The sTEM10.
Dual moment system
Low moment current – 1 Amp
High moment current – 10 Amp
Number of Rx channels – 1
Power – (14.4 V, 6.8 Ah, 99.4 Wh) 2 batteries
Tx loop options – 20×20 m, 40×40 m 80 x 80 m
Waveform recording – Pre-recorded
Control app – iOS, Android
Pulse on/off times – Pre-defined
LM On-time/Off-time – 46%/54%
HM On-time/Off-time -30%/70%
Service and upgrades – Via Internet
The sTEM Controller App is available for both iOS and Android.
sTEM10 KEY FEATURES
- Power Output: The sTEM10 enables subsurface investigations, reaching depths up to 500 meters (approximately 1650 feet).
- Dual Moment System: This feature allows the instrument to gather data from shallow and deep subsurface layers into a single measurement.
- Integrated Design: Combining transmitter (Tx) and receiver (Rx) electronics into a single unit enhances portability and ease of use.
- Transmitter Loop Sizes: The system accommodates various loop sizes – 20 x 20 m, 40 x 40 m, and 80 x 80 m, allowing flexibility based on survey requirements and desired depth penetration.
- Active Current Regulation: Maintains consistent current levels during measurements, ensuring data accuracy and reliability.
- Auto sign flip: In central loop configuration, the sTEM activates an auto sign flip, so it is not dependent on which direction the transmitter coil is rolled out and connected.
- Portability: The 20 m x 20 m sTEM10 weighs approximately 15 kg (33 lbs), including transmitter and receiver coils. It is designed for field portability and can be transported as check-in luggage, facilitating ease of deployment in various locations.
- User Interface: Operated via an intuitive Android or iOS application.
- Connectivity: Equipped with Wi-Fi and internet capabilities, the sTEM10 allows seamless data upload and remote support, enhancing operational efficiency.
Want to know more about the pricing and flexibility of the sTEM20? Contact our team of experienced geophysicists to discuss how we can help you deliver the best possible data for your project.
POWERFUL AND ACCURATE
The sTEM20.
Dual moment system
Low moment current – 1 Amp
High moment current – 20 Amp
Number of Rx channels – 1
Power – (14.4 V, 6.8 Ah, 99.4 Wh) 3 x batteries
Tx loop options – 20×20 m, 40×40 m 80 x 80 m
Waveform recording – Pre-recorded
Control app – iOS, Android
Pulse on/off times – Pre-defined
LM On-time/Off-time – 46%/54%
HM On-time/Off-time -30%/70%
Service and upgrades – Via Internet
The sTEM Controller App is available for both iOS and Android.
sTEM20 KEY FEATURES
- Power Output: The sTEM20 enables subsurface investigations, reaching depths beyond 500 meters (approximately 1650 feet).
- Dual Moment System: This feature allows the instrument to gather data from shallow and deep subsurface layers into a single measurement.
- Integrated Design: Combining transmitter (Tx) and receiver (Rx) electronics into a single unit enhances portability and ease of use.
- Transmitter Loop Sizes: The system accommodates various loop sizes – 20 x 20 m, 40 x 40 m, and 80 x 80 m, allowing flexibility based on survey requirements and desired depth penetration.
- Active Current Regulation: Maintains consistent current levels during measurements, ensuring data accuracy and reliability.
- Auto sign flip: In central loop configuration, the sTEM activates an auto sign flip, so it is not dependent on which direction the transmitter coil is rolled out and connected.
- Portability: The 20 m x 20 m sTEM20 weighs approximately 19 kg (42 lbs), including transmitter and receiver coils. It is designed for field portability and can be transported as check-in luggage, facilitating ease of deployment in various locations.
- User Interface: Operated via an intuitive Android or iOS application.
- Connectivity: Equipped with Wi-Fi and internet capabilities, the sTEM20 allows seamless data upload and remote support, enhancing operational efficiency.
Want to know more about the pricing and flexibility of the sTEM20? Contact our team of experienced geophysicists to discuss how we can help you deliver the best possible data for your project.
Your questions answered
What geophysical applications can I use an sTEM for?
The sTEM 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 sTEM can map saltwater boundaries in regions prone to flooding, rising seas, or artificially lowered groundwater levels.
Well Siting in Hard Rock.
The sTEM can help ensure safe water for communities, agriculture, and industries.
Contaminated Areas.
The sTEM 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 sTEM. Efficient identification promotes responsible resource management and sustainability.
Weathered Bedrock.
The sTEM can help locate these areas, supporting well drilling and sustainable water management in challenging environments.
Permafrost Mapping.
The sTEM can help determine permafrost depth, supporting infrastructure planning and environmental protection in climate-sensitive regions.
How deep can I scan for with an sTEM system?
Investigation depths reached are dependent on specific environmental conditions:
sTEM5.
The entry-level sTEM5 delivers accurate data to depths of 150 m – 200 m. It conducts single-site measurements and captures data up to 200 m (656 ft).
sTEM10.
The sTEM10 delivers accurate data to 200 m—500 m depths. It conducts single-site measurements and captures data at depths between 200m (656 ft) and 500 m (1650 ft).
sTEM20.
The powerful sTEM20 delivers accurate data to 200 m—600 m depths. It conducts single-site measurements and captures data that reaches depths beyond 500 m (1650 ft).
The investigation depth of each sTEM can vary based on its specific configuration, subsurface conditions, and survey requirements. Please get in touch with our support team for detailed specifications and to determine the most suitable system for your project.
Does it take long to learn how to use an sTEM?
Learning to use an sTEM instrument typically involves theoretical understanding and practical training. The time required to become proficient depends on your experience with geophysical equipment and data interpretation. Here’s an approximate breakdown:
Basic Training: 1–2 Days
- System Setup and Operation: Understanding how to assemble and calibrate the sTEM device.
- Data Acquisition: Learning how to perform field measurements effectively.
- Instrument Maintenance: Basic care and troubleshooting.
Intermediate Training: 1–2 Weeks
- Data Processing: TEMcompany’s partner software processes raw data and creates 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 supervised 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 might find it much quicker to get started. For beginners, the timeline above provides a realistic estimate.
Will an sTEM work in extreme temperatures?
Yes, sTEM instruments are designed to operate in various environmental conditions, including extreme temperatures. However, performance depends on the specific operating temperature range. Here’s what to consider:
Operating Temperature Range
Most geophysical instruments, including sTEM, are built to function in environments from -30 °C to +50 ° C (-22 ° F to +122 °F). This range typically covers extreme cold and heat encountered in fieldwork.
Performance Considerations
Cold Environments: -5 °C and below
- 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.
Hot Environments: 35 °C and above
- 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:
- Our instruments are built to withstand exposure to dust and humidity, but it is important to keep connectors dry and clean.
- Extreme environments like torrential 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.
Consult the Manual: Review the instrument’s technical specifications for its exact temperature and environmental tolerances. Check the sTEM user manual for detailed technical specifications and operating guidelines for a more precise answer.
If you need further assistance, don’t hesitate to contact our support team for guidance tailored to your specific operating conditions.
Can you help me to choose the right 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.
Upgrades and updates
TEMcompany instruments are built for the future. Over-the-air updates keep your instrument running on the latest software, enabling you to get the most accurate data for your project.
Delivering accuracy with our data partners.
TEMcompany’s instruments deliver accurate and reliable data. We work closely together with Seequent to provide the tools that help make geophysical profiling easy.
TRANSIENT ELECTROMAGNETIC GEOPHYSICAL SURVEYS
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.
