Picking the Right Geophysical Gear for the Job
EE+S rents geophysical equipment across four methods: GPR for near-surface, non-invasive imaging (utilities, rebar, voids), EM for fast conductivity mapping and metal detection, resistivity for deeper subsurface characterization, and seismic for ground-movement and wave-propagation surveys. Match the method to what you’re looking for and how deep it sits, then narrow to a specific instrument from GSSI, Geonics, AGI, or Geometrics.
Which Method Do You Need?
| Method | What It’s For | Best For | EE+S Equipment |
|---|---|---|---|
| GPR | Non-invasive subsurface imaging | Utility locating, rebar/conduit detection, concrete scanning, shallow voids | GSSI SIR 3000/4000, StructureScan Mini/Mini XT/Mini LXT |
| EM (Electromagnetic) | Conductivity mapping & metal detection | Environmental site characterization, UXO detection, geotechnical surveys | Geonics EM31-MK2, EM38-MK2, EM61-MK2A |
| Resistivity | Deeper subsurface characterization | Soil characterization, environmental site assessments, mineral exploration | AGI SuperSting R8, AEMC Model 4630 |
| Seismic | Ground movement & wave propagation | MASW surveys, near-surface to large-scale 3D seismic studies | Geometrics Geode (see dedicated page) |
Ground Penetrating Radar (GPR): Subsurface Imaging, Simplified
GPR systems are the go-to tools for non-invasive investigation of underground features — ideal for locating utilities, voids, and changes in material properties. EE+S’s GPR rental lineup includes the GSSI SIR 3000 and SIR 4000 control units, survey carts with 270 MHz, 400 MHz, and 900 MHz antennas, and StructureScan Mini, Mini XT, and Mini LXT for concrete scanning. GPR provides high-resolution, real-time data and is essential for utility locating, rebar detection, and structural analysis in concrete.
Electromagnetic (EM) Conductivity Meters: Fast, Non-Invasive Mapping
EE+S’s EM fleet includes the most trusted names in electromagnetic geophysics, built for conductivity mapping and metal detection: the Geonics EM31-MK2 (large-scale conductivity contrasts), the EM38-MK2 (optimized for shallow subsurface investigations), and the EM61-MK2A, a high-resolution time-domain metal detector that locates ferrous and non-ferrous metals even in highly mineralized soils. These tools are widely used in environmental site characterization, UXO detection, and geotechnical surveys.
Resistivity & Seismic Systems: Deep Subsurface Insight
For deeper geophysical surveys, EE+S rents resistivity systems such as the AGI SuperSting R8, a flexible, Wi-Fi-enabled platform for soil characterization, environmental site assessments, and mineral exploration, plus the AEMC Model 4630 Four-Point Ground Resistance Tester for fast, reliable measurements. For seismic investigation, EE+S’s fleet runs from geophones up through the Geometrics Geode for monitoring ground movement and wave propagation — see the dedicated Geode seismic equipment page for full configuration options, including the LandStreamer system for rapid MASW surveys.
Concrete Scanning: Non-Destructive, High-Resolution Imaging
To find rebar, post-tension cables, or conduits in concrete, EE+S’s GSSI StructureScan line is purpose-built for fast, effective concrete scanning — lightweight, field-ready, and providing real-time imagery for accurate depth and location of embedded materials. Ideal for structural inspections, renovations, and coring applications.
Applications EE+S Supports
- Environmental engineering — site characterization, soil resistivity, contamination mapping
- Geotechnical investigations — subsurface profiling and structural surveys
- Archaeology — locating buried artifacts and features
- Mining and mineral exploration — delineation of ore bodies and vein systems
- Utility detection and civil engineering — avoiding costly hits with accurate location data
FAQ
What’s the difference between GPR and EM for utility locating?
GPR images subsurface features directly, including non-metallic utilities like PVC, and works well for shallow, high-resolution detail such as rebar or conduits. EM is faster for broad conductivity mapping and is especially effective at detecting metallic objects, including ferrous and non-ferrous targets EM61-MK2A can pick up even in mineralized soil. Many projects use both together.
How deep can Geonics EM equipment detect?
It depends on the model and target: EM31-MK2 is built for larger-scale conductivity contrasts, EM38-MK2 is optimized for shallow investigations, and EM61-MK2A is tuned for near-surface ferrous and non-ferrous metal detection. EE+S can help match the right unit to your target depth and soil conditions.
Do you rent seismic equipment separately from other geophysical gear?
Yes — the Geometrics Geode and related seismic accessories are available on their own or alongside GPR, EM, or resistivity equipment for the same project. See the dedicated Geode seismic equipment page for full details.
Why Rent from EE+S?
Every instrument is maintained to manufacturer specifications, calibrated, and shipped with everything needed to get started — flexible rental terms, technical support, field-tested configurations, and fast nationwide delivery (availability permitting).
Related Resources
- Geometrics Geode seismic equipment
- Underground utility locating tools
- Full geophysical equipment rental inventory
Ready to Rent?
Contact our team today to reserve the right geophysical equipment for your job. From GPR and EM meters to resistivity systems and seismic equipment, we’ll make sure you have the tools and expertise to locate, map, and mark with confidence. Browse geophysical rentals or contact EE+S.