eQube™ Capacitive Electric-Field Imaging Sensor
Fast. Simple. Precise. The eQube™ is a highly accurate, broadband, stable capacitive electric-field sensor that operates in a wide variety of environments and challenging terrains for both fast and long-term surveys.
Challenging Terrains – eQube™ sensors function well in a variety of lithologic and ground types where other electric-field sensors do not. This includes desert, frozen tundra, gravels, volcanic rock, and more. Additionally, readings in more common sediment and soil types such as those present in most grass and farm land are achievable.
Weather Conditions – eQube™ sensors operate in extremely hot and cold weather as well as in mild and moderate conditions.
Environmental Sensitivities – eQube™ sensors are ideal in regions where environmental invasion should be minimized or permitting is difficult.
Subtle Subsurface Changes – eQube™ sensors are ideal when looking for small changes in the subsurface such as bulk fluid movements and even fingering.
Complex Geologies & Deep Targets – eQube™ sensor precision is critical when looking at targets that are deep or in areas with complex geology that limit signal strength at the surface.
- Remote or distant locations
- Sites that are difficult to access with heavy equipment
- Large projects
- Noise surveillance for feasibility modeling
- Quick characterization for fast survey design
For more information on long-term monitoring, see our Services Roadmap.
How They Work
The eQube™ sensors employ a chemically inert electrode plate that couples to the electric potential in the earth via capacitive coupling (rather than ionic exchange with the local earth). The coupling is a purely electromagnetic phenomenon, which has no temperature, ionic concentration or corrosion effects.
The eQube™ employs ultra-high impedance feedback techniques that provide a high level of immunity to the sensor-to-ground contact impedance, and thereby produce unprecedented measurement fidelity. The key performance characteristic is that the sensor output to a constant signal (its accuracy) does not vary with the ground resistance. This enables rapid deployment and stability in all terrains and changing ground environments caused by varying weather conditions, ground compaction, and ground fissuring.
The inert contact to the ground provides an operational lifetime on the order of years and possibly tens of years, even when exposed to extreme environmental conditions. These properties allow the sensors to remain unattended throughout the year.