Active Field Mitigation Systems
C-INTECH designs and implements active field mitigation systems to reduce unwanted low-frequency magnetic field fluctuations around sensitive equipment and controlled spaces. Using field measurement, engineering analysis, FEA-supported design, sensors, controllers, and compensation coils, we develop systems around the conditions measured at your facility.
When Magnetic Field Fluctuations Start Affecting Your Equipment
Magnetic interference may not be visible, but sensitive equipment can respond to relatively small changes in the surrounding field. Sources can include electrical distribution equipment, power infrastructure, elevators, industrial equipment, and other nearby systems.
Even small or changing magnetic fields can:
- Distort MRI image quality
- Affect sensitive measurements
- Reduce equipment accuracy
- Create unstable instrument readings
Passive magnetic shielding can be effective, but it is not always the best standalone solution for changing low-frequency disturbances. Existing construction, available space, field direction, source behaviour, and the required controlled area can all influence the mitigation approach.
How We Stabilize the Magnetic Environment Around Sensitive Equipment
C-INTECH designs active field mitigation systems around measured field conditions, equipment sensitivity, room geometry, and the required compensation area.
The system continuously:
- Measures magnetic field changes
- Detects changing interference
- Drives compensation coils
- Generates an opposing magnetic field
The objective is to reduce unwanted field fluctuations within the defined control area so sensitive equipment can operate in a more stable magnetic environment. Depending on the application, the control system may use feedback or adaptive control to adjust compensation as conditions change.
How Active Magnetic Field Cancellation Works
The principle is similar to noise cancellation: measure the disturbance, process the signal, and generate an opposing field.
1. Sensors Detect Field Changes
Precision magnetic field sensors monitor changes within the selected control area.
2. The Controller Processes the Disturbance
The controller evaluates the measured field and determines the compensation required.
3. Compensation Coils Generate an Opposing Field
Coils arranged around the controlled area produce a counteracting magnetic field along the required axes.
4. The System Adjusts in Real Time
Coil output responds as the surrounding magnetic field changes, reducing disturbance within the designed compensation zone.
C-INTECH can use FEA modelling to evaluate coil geometry and field distribution before installation.
Coil systems may be integrated into walls or installed as free-standing frames where project conditions require.
Where Active Field Mitigation Is Most Effective
Active mitigation is suited to environments where equipment performance can be affected by changing low-frequency magnetic fields.
- MRI Facilities: Helps reduce external magnetic fluctuations that may affect sensitive imaging environments.
- Research & Scientific Labs: Supports stable conditions for instruments requiring tight control of surrounding magnetic fields.
- Semiconductor & Precision Manufacturing: Helps protect field-sensitive processes and measurement equipment from changing magnetic disturbances.
- High-Sensitivity Industrial Sites: Provides targeted field control near electrical infrastructure, industrial equipment, or other variable magnetic sources.
When You Need an Active Field Mitigation System
An active mitigation system may be appropriate when measured magnetic field conditions exceed the tolerance of the equipment or space being protected.
You may need active mitigation if:
- Equipment is sensitive to magnetic noise
- Imaging or readings are inconsistent
- Magnetic fields change over time
- Heavy electrical sources are nearby
- Space limits passive shielding options
- Passive shielding alone is insufficient
- Existing facilities require retrofit mitigation
If the source or required mitigation level is uncertain, a site magnetic field assessment is typically the first step. C-INTECH can measure existing conditions and determine whether active mitigation, passive shielding, design changes, or a combined approach should be evaluated.
What Your Active Field Mitigation Project Includes
The scope is developed around the measured field conditions, equipment requirements, site geometry, and the area requiring control.
- Site magnetic field analysis
- Baseline field measurements
- Mitigation design recommendation
- FEA-supported coil layout
- Sensor and controller layout
- Installation and integration support
- System calibration
- On-site performance verification
- Before-and-after field comparison
- Technical validation reporting
The exact deliverables depend on whether the project involves a new installation, retrofit, expansion, or investigation of an existing interference problem.
Why Choose C-INTECH
Active magnetic field cancellation requires more than selecting equipment. The system has to be designed around the source, field behaviour, equipment sensitivity, room geometry, and required control zone.
- 25+ years of EMF/RF experience
- 500+ completed projects
- Engineering-led field assessment
- FEA-based magnetic field analysis
- Project-specific mitigation design
- Installation and calibration support
- On-site performance verification
- EMF, RF and EMI expertise
C-INTECH can support the project from initial magnetic field measurement and analysis through mitigation design, implementation, calibration, and verification.
Related Services
On-site measurement of low-frequency magnetic fields to identify sources, field levels, and potential interference concerns.
Measurement and analysis of RF signals where radio-frequency interference, exposure, or wireless conditions need to be evaluated.
FEA-based modelling used to predict magnetic field conditions and assess mitigation options during project design.
Engineering assessment of electromagnetic conditions that may affect MRI siting, installation, or surrounding sensitive spaces.
Purpose-designed RF shielding for spaces requiring protection from unwanted radio-frequency signals.
Frequently Asked Questions
An active field mitigation system measures changing low-frequency magnetic fields and drives compensation coils to generate an opposing field. The goal is to reduce unwanted fluctuations within a defined control area around sensitive equipment or spaces.
Passive magnetic shielding uses materials and geometry to redirect or attenuate magnetic fields without powered control equipment. Active mitigation measures field changes and responds dynamically using sensors, a controller, and compensation coils. The best approach depends on frequency, field behaviour, geometry, available space, and equipment requirements.
Active mitigation can be used in MRI facilities, research laboratories, precision manufacturing environments, electronics testing areas, and other locations containing field-sensitive equipment. Whether it is appropriate depends on the measured magnetic environment and the equipment’s susceptibility limits.
An active mitigation system should not be assumed to eliminate every magnetic disturbance. Achievable performance depends on factors including source characteristics, frequency, field direction, room geometry, coil configuration, sensor location, and the size of the required control area. Testing and verification are used to assess the installed system against the defined project requirements.
Often, yes. Active systems can be considered for retrofit applications where construction conditions or available space make passive solutions difficult to implement. A site assessment is needed to determine coil placement, sensor locations, installation constraints, and the expected mitigation approach.
Need a Stable Magnetic Environment?
If changing magnetic fields are affecting sensitive equipment, C-INTECH can identify the source, measure existing conditions, and determine an appropriate mitigation approach for your facility.
Why Choose us
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Pulvinar viverra facilisis tempus molestie nulla inceptos. Per sagittis urna rutrum ac suspendisse si sollicitudin iaculis lorem. Nisi rhoncus porttitor enim et arcu a suspendisse risus.
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