Electromagnetic Radiation Field (EMF), Interference (EMI), and Compatibility (EMC) Consulting Services
Surveys, Inspections, Investigations, Assessments, Deep Measure Analysis and Diagnostics, Predictive Simulations and Advanced Design Modeling, EMF-EMI Mitigation and EMC Pre-Compliance Consulting Services
EMI-EMC-EMF Engineering for Compliance, Health, Safety, and Design Integrity
Princeton, New Jersey
ELEXANA is an award-winning industry leader in EMF, EMI, and EMC Electromagnetic Consulting Services. Our international reputation began in 2018 when we quietly solved the ADAS, the Advanced Driver Assistance Systems, used in almost every new automobile. We are known for providing comprehensive on-site testing, survey assessments, root-cause identification and attenuation, investigations, inspections, and solving complex Electromagnetic Interference (EMI), Electromagnetic Compliance (EMC) Designs, Electromagnetic Field Radiation (EMF), and Radio Frequency Interference (RFI) problems.
Residential EMF-EMI Testing, Assessments, and Mitigation Consulting Services
Commercial EMF-EMI-EMC Site Surveys, Inspections, and Investigations with Solutions
Residential and Commercial Low EMF-EMI New Construction Design Consulting Services
EMCpass.net
ISO 17025 Certified Calibrated Surveys to National and International Standards
We are General Liability and Professional Liability Insured.
ELEXANA supplies a diverse array of electromagnetic radiation consulting services.
Here are a few:
EMI-EMC-EMF Forensic Investigations identify and solve the causes of malfunctioning equipment in industrial, scientific research, and medical centers.
EMC Pre-Compliance Consulting includes testing on-site or in our Lab, EMI/RFI troubleshooting, EMC/EMI mitigation design, and EMI filter design for products in development.
New Construction Building Design EMI-EMC Consulting for IT & data centers, production studios, laboratories, airports, hospitals, medical centers, high-end residential, and community development projects.
EMF/EMI/EMC Surveys for Implanted Medical Devices, Electrical Power, and Telecom Installations; ISO-17025 and OSHA Certified. > We now have a dedicated electrical engineer, Phillip D., with thirty years of field experience, who worked for the company that makes our survey test equipment. He specializes in conducting this fieldwork for us and leads the ELEXANA Field Test Division.
Magnetic, RF Faraday, TEMPEST, and HEMP Shield Consulting, including shielding effectiveness testing, shielding design, and material effectiveness testing.
Ground System Consulting, including 4-Point Wenner Soil Resistivity Testing, Kelvin 3-Point Testing, energized ground testing, micro-ohmeter bond testing, and grounding design.
Electrical Power Consulting, including Three-Phase 5-wire and Single-Phase 4-wire I-V analysis, transient testing, SNR, THD, I-V Trend datalogging, infrared tests, wire tracing, deep measure, voltage drop (%), and conducted emissions.
Testimonials
☀️☀️☀️☀️☀️
“The director of the new documentary "Generation Zapped" will be on my show next week, and the film inspired me to get EMF (electromagnetic field) testing for my own home. I was a bit nervous about it because there is a lot of charlatanism in all these "alternative" services, but OMG, what a fabulous company and what a wonderful person did this testing for us! Jim from Elexana was so thorough, so knowledgable, so patient, and so understanding. How refreshing to deal with a company that is trustworthy, does what they'll say they do, doesn't promise miracles, and doesn't try to sell you a bunch of extra stuff." - Victoria Moran, Author, Speaker, Vegan Lifestyle Coach, Director Main St. Vegan Academy, training & certifying Vegan Lifestyle Coaches at Main Street Vegan
“Jim was excellent. He is an expert in his field, and pointed out simple things we could do to help improve the quality of our home life. Peace of mind is priceless, and this costs a lot less than that! Well worth it.” - Scott Harris, of Brown, Harris, Stevens, NYC’s residential real-estate company
“I want to thank Elexana and it’s staff for the tremendous insight, knowledge, and help they provided my family and me. By testing all of the electromagnetic fields in our New York City apartment and changing our habits, my wife now sleeps easier and we all feel healthier in our environment! Thank you again, Elexana!” - Jay Zimner, NYC’s residential real-estate attorney
“Elexana offers the most comprehensive EMF testing. Jim (the owner) is wildly knowledgeable, has many years of experience, is deeply kind, sincere, and honest. I felt confident learning from an expert who has worked in NYC extensively and who understands the ins and outs of how this city works.” - Meredith Geller, Holistic Nutritionist, The Elevated Life, NYC
Read more testimonials…
OSHA-certified
NFPA® 70E Certified Grounding and Bonding Testing
ANSI/AEMC Engineered Trained
A Member of the Bioelectromagnetics Society
A Member of the NFPA® National Fire Protection Association
A Member of the Electromagnetic Compliance Society of the IEEE
A Member of the IEEE New York Chapter
D-U-N-S Registered
E-Verified and Approved by Homeland Security
HIPAA-compliant
We can also test your electrical system ground.
Suppose your home is not grounded adequately, meaning below 25 Ohms or, even better, < 5 Ohms. In that case, the E-fields have more span and amplitude, the dirty electricity (harmonic transients) has nowhere to go, and filtering is less effective.
Here you see our current sensor probe and Tektronix oscilloscope working together to read the EMI on an Apple Trackpad II. Rather than the sine wave being a smooth 60 Hertz wave, it is very jagged. Notice the 645.9 kHz Frequency. Copyright ©2020
Elexana considers the complexities of reflection, radiative/capacitive/inductive/conductive/resonant/magnetic phase synchronous coupling, signal density and phase coherence, trace integrity, oscillation, multi-path interference, pulse rate modulation, cross-talk, grounding system testing, and more.
Residential EMF Testing Checklist
Image: Client with a EMF Testing Checklist taking notes.
What you should expect from a professional assessment:
Here is a data log mapping at a bed of the electric and the magnetic fields measured as separate energies. We can explain what this information means to you and how to make the simple adjustments so that you sleep closer to natural energy levels.
Stray Current can enter your building via water, gas, and coaxial internet service lines or your HVAC system. It is measured in amperes and flux density. Be sure your consultant can provide solutions compliant with the National Electric Code, NEC.
Complete Grounding System assessment check and measuring in mV, amperes, and fundamental frequencies on each, often they are not 60 Hertz. This check is for two testings: the EGC Equipment Ground Conductor System and the Overload Lightning Protection System. Singular to Elexana LLC, we measure your grounding system's impedance to ensure that it is < 25 Ohms.
(We can also conduct a soil resistivity test with a state-of-the-art 4-point ground rod Wenner Test and calculate how many ground rods you require to reach the NEC requirement of < 25 Ω, upon request.)
AC Magnetic Fields to 30 MHz, indoors and outdoors, must be measured. Most measure 1 MHz at best, but we include the magnetic fields from HF High-Frequency sources. The spectrum range between 1 - 30 MHz is the most overlooked bandwidth because the equipment to measure this bandwidth correctly is so expensive. This may be why this ubiquitous field is not discussed much but should be included in every assessment. We identify and isolate the size, shape, coupled frequency bands, velocity, and all co-signaling fields. We identify source points and propose the best solutions. Many of these sources can be remediated. AC Magnetic emissions from your appliances and other source points, such as power lines, electrical conduits, risers, and heating panels, must be measured. If your work requires power tools, then your tools need to be measured. Your consultant must be trained and qualified to identify wiring errors and provide instructions to your electrician on how to fix them.
Airborne AC Electric Fields to 60 MHz, measured in Volts-per-meter, V/m. This includes all E-fields emitted by ungrounded lamps and appliances, Romex (unshielded home electrical wiring), and poorly grounded electrical distribution lines. Tip: sometimes, powering OFF a bedroom will increase the E-Field flux within a room, so please do not do this unless it is verified as safe.
DC Magnetic Fields, measured in nanoTesla (nT) with a state-of-the-art DC magnetometer used for scientific research. Geomagnetic stress can be a severe issue at specific locations and should not be overlooked.
DC Electrostatic Fields, measured for source-point identification. (We measure this in V/m for commercial interference applications and surface voltage for those with pacemakers and/or heart conditions.) Be sure to receive a solution plan. A DC static shock can cause serious harm.
Epidermal Voltage, measured at the workstations and sleeping areas to help determine and remediate source points. Much of this work is often done during an assessment. We measure our epidermal voltage as a reference. Clients can opt to have their voltage measured too.
Electromagnetic Interference, EMI, often incorrectly termed Dirty Electricity (DE) measured on the phase, neutral, and ground using an oscilloscope amplitude and FFT. Also, measuring airborne EMI is essential. (To only use a plug-in Broadband EMI Line Meter to sell wall outlet filters is an overdone sales tactic to ramp up commissions.) We use state-of-the-art equipment to accurately and thoroughly assess the harmonic transients coupled to your electrical system’s 60 Hertz sine wave.
Radio Frequencies for the 5G Network, At Elexana, we can measure RF analyzed in 3-D with a 100% POI (Percentage of Intercept) spectrum analyzer using units: dBm, Watts, Voltage, and Amperage from frequencies as low as 9kHz to determine and isolate source points directionality.
Note: The consultant should consider much more than power density levels: the number of signals and frequency clusters, reflection rate, phase distortions, signal coherence, multi-path interference, and more. Only measuring peak levels does NOT tell the whole story for providing the best RF solutions. Peak levels from a hand-held meter are almost always incorrect.
Baseline Testing of all Ambient Fields: A full and final conclusive EMF assessment of all emissions entering the home from outdoors or the surrounding apartments versus what is produced within the home. Make sure the consultant provides clear solutions. Simply recommending that you get some distance from a source point is not a professional solution.
Above, is an AC Magnetic gaussmeter’s data log while walking from the rear edge of a property, closest to power lines (left-to-right), to the very front of the property near the street curb, and then over to an electrified dog fence and back down the driveway. The green background shows that this entire property was below 20 nT and therefore considered as “no concern” for AC magnetic radiation, according to the Building Biology, Bau Biologie, standards. ©2022
Here, you will find information to help understand the difference between the types of EMI Consulting Services and what to look for in a company offering EMI Testing Solutions.
EMI Survey
Definition: An electromagnetic interference EMI survey is a scientific assessment of the unintended conductive and radiative emissions that may interfere with the functioning of electronic equipment or systems.
Purpose:
Check background EMI/EMF levels.
Verify compliance with environmental standards.
Identify hotspots or areas at risk of interference.
It is often done proactively as part of site qualification, especially in sensitive environments like hospitals, labs, or data centers.
Scope:
Wide area or whole system.
Focused on characterizing the environment, not necessarily finding the cause of a specific problem.
May involve long-term monitoring or periodic checks.
Key Features of an EMI Survey
1. Detailed Measurement of Electromagnetic Fields.
Uses calibrated instruments (spectrum analyzers, EMI receivers, near-field probes, antennas, field strength meters) to quantify electromagnetic emissions across defined frequency ranges.
Captures both radiated and conducted emissions.
2. Baseline EMI Environment Assessment.
Maps out the existing electromagnetic environment in a site (facility, lab, data center, hospital, etc.).
Identifies background EMI sources (external: like nearby radio transmitters; internal: like industrial machinery or IT equipment).
3. Compliance Verification.
Compares measured emissions and susceptibility levels to relevant EMC standards (FCC Part 15, IEC 61000, MIL-STD-461, CISPR standards, etc.).
Ensures systems are within acceptable EMI limits.
4. Identification of Potential Risks.
Highlight equipment or locations vulnerable to EMI problems.
Identifies EMI “hot spots” where emissions may exceed thresholds or pose interference risks.
5. Comprehensive Site or System Coverage.
Includes multiple locations across a site (rooms, floors, equipment racks, shielded enclosures).
Often includes airborne (radiated) and line-bound (conducted) interference checks.
6. Use of Specialized Measurement Techniques.
Near-field vs. far-field probing.
Broadband vs. narrowband scans.
Time-domain or frequency-domain analysis.
7. Reporting and Documentation.
Provides detailed measurement data, spectral plots, field maps, and tables.
Includes a written summary of findings, risk assessment, and recommendations for mitigation (if needed).
8. Support for Further Investigation or Design Improvement.
Acts as the foundation for:
EMC design improvements.
Shielding or filtering upgrades.
Root-cause investigations are conducted if specific EMI problems are uncovered.
Where Are EMI Surveys Used?
Hospitals (to protect sensitive medical devices).
Data centers (to ensure reliable IT performance).
Manufacturing facilities (to safeguard automated systems and robotics).
Research labs (where precision measurements are EMI-sensitive).
Military or aerospace sites (where strict EMC standards apply).
Office or residential towers (especially near strong RF emitters).
EMI Investigations
Definition: An EMI investigation is a targeted diagnostic process triggered by a specific problem or suspected interference. It aims to identify, isolate, and resolve the root cause.
Purpose:
Understand why a device or system is malfunctioning or failing EMC tests.
Trace the specific interference source (which could be internal or external).
Recommend solutions (shielding, grounding, filtering, redesign, etc.).
Scope:
Narrowed to the system or components involved in the failure.
Involves deeper, often more technical, analysis (including circuit-level reviews or near-field probing).
EMI Investigation: Required Skills & Knowledge
Deep Technical Knowledge of EMC Principles
Understanding of coupling mechanisms (conducted, radiated, common-mode, differential-mode)
Familiarity with shielding, filtering, and grounding techniques
Advanced Measurement & Diagnostic Tools
Skilled use of near-field probes, current clamps, LISNs (line impedance stabilization networks), oscilloscopes, time-domain tools
Ability to interpret detailed measurement data, not just record it
Circuit-Level & System-Level Understanding
Ability to trace interference paths through PCBs, wiring, enclosures
Knowledge of how system design choices affect EMI performance
Knowledge of Compliance & Regulatory Requirements
Familiarity with specific test standards (FCC Part 15, CISPR 22, MIL-STD-461, RTCA/DO-160, etc.)
Understanding pre-compliance vs. full compliance testing requirements
Analytical & Problem-Solving Skills
Ability to hypothesize, isolate, and test root causes
Experience applying design fixes or mitigation solutions
Hands-On Engineering Skills
Sometimes requires circuit rework, adding ferrites, redesigning layouts, or modifying enclosures.
Main Steps Involved in an EMI Investigation
Define the Problem Clearly
Identify and document:
The observed issue (e.g., system malfunction, data loss, communication failure, equipment reset).
When and where it occurs (specific times, locations, conditions).
The systems or devices are affected.
Any history of the problem or previous attempts to solve it.
Review Background Information
Gather:
System designs, schematics, and prior EMI/EMC reports.
Equipment manuals and susceptibility specs.
Environmental conditions (e.g., nearby transmitters, power disturbances, machinery).
Develop an Investigation Plan
Define:
What measurements are needed (radiated, conducted, near-field, time-domain).
The tools and instruments should be used (spectrum analyzers, oscilloscopes, TDRs, probes).
The test points and environmental factors to assess.
Conduct Targeted Measurements
Perform on-site tests to:
Identify EMI sources (external or internal).
Map interference paths (how it couples into sensitive systems).
Measure EMI levels vs. system susceptibility thresholds.
Use advanced techniques:
Near-field scanning, source localization.
Time-domain analysis of transient events.
Monitoring under different operating conditions.
Perform Root-Cause Analysis
Trace the exact mechanism causing the problem:
Is it radiated or conducted?
Common-mode or differential-mode coupling?
Ground loops, shielding failure, cable crosstalk, or parasitic coupling?
Correlate findings with system behavior.
Recommend Mitigations
Propose practical solutions, such as:
Shielding improvements.
Filter or ferrite installations.
Grounding or bonding adjustments.
Cable rerouting or equipment relocation.
Design modifications (if needed).
Validate Fixes (Optional but Ideal)
After applying fixes, re-measure and confirm that the interference problem is resolved.
Document the Investigation
Provide a detailed report with:
Description of the problem.
Measurement data and analysis.
Root-cause findings.
Recommended solutions and their technical basis.
Confirmation of resolution (if tested).
Where Are EMI Investigations Used?
Hospitals: When life-critical medical devices malfunction.
Data centers: When servers crash or communication links drop.
Industrial sites: When control systems or sensors behave unpredictably.
Military/aerospace: When mission-critical or safety-critical systems face unexplained disturbances.
Research labs: When precision instruments show unexplained noise or instability.
What’s Special About EMI Investigations?
Highly targeted — focus on solving an active or suspected interference problem.
More advanced tools and techniques — beyond general surveys or inspections.
It requires deep expertise and is often handled by senior EMI/EMC engineers or specialists.
Outcome-driven — the goal is not just to measure, but to explain, solve, and verify.
EMI Inspections
Main Steps Involved in an EMI Inspection
Define Inspection Purpose and Scope
Clarify why the inspection is being done:
Pre-installation or pre-commissioning check.
Routine compliance or maintenance check.
Visual assessment for potential EMI risks.
Define which systems, equipment, or areas will be inspected.
Review Design and Documentation
Examine:
Grounding and bonding schematics.
Cable routing and shielding layouts.
Equipment placement relative to known EMI sources.
Check that installed systems match design specifications and applicable EMC/EMI standards.
Perform Visual and Physical Inspection
Inspect:
Physical integrity of shielding, gaskets, and enclosures.
Proper grounding and bonding connections.
Cable management — are signal and power lines properly separated? Are shield terminations correctly done?
Placement of sensitive equipment relative to known EMI emitters.
Conduct Spot Checks (If Needed)
Use portable meters or handheld EMI detectors to:
Check for obvious hot spots.
Verify grounding continuity.
Confirm shield effectiveness (simple checks, not full lab-grade measurements).
Assess Compliance and Best Practices
Evaluate:
Whether installations follow EMC design best practices.
Whether systems comply with applicable EMI standards or client-specific requirements.
Identify potential risks or vulnerabilities, even if no current EMI issue is reported.
Document Findings
Provide a report with:
Summary of visual and physical findings.
List of compliance issues or areas needing improvement.
Photos or diagrams showing key points.
Recommended corrective actions or improvements.
Recommend Next Steps (If Needed)
If problems or risks are found:
Recommend further testing (full EMI survey or investigation).
Suggest practical fixes (e.g., improving grounding, adding ferrites, improving cable shielding).
EMI Inspections Apply to:
New or renovated installations (before going live).
Hospitals, labs, data centers — ensuring environments are properly prepared for sensitive equipment.
Industrial or commercial sites — periodic compliance checks or maintenance audits.
Construction or renovation projects — ensuring EMI-sensitive design elements are implemented properly.
What’s Not Typically Included?
Full spectral or quantitative EMI measurements (requires an EMI survey).
Deep root-cause troubleshooting or engineering fixes (belongs to an EMI investigation).
Regulatory certification or test lab work.
Here’s a clear summary of what is involved with an EMI investigation, which is the most advanced and targeted EMI service compared to surveys or inspections:
Main Steps Involved in an EMI Investigation
Define the Problem Clearly
Identify and document:
The observed issue (e.g., system malfunction, data loss, communication failure, equipment reset).
When and where it occurs (specific times, locations, conditions).
What systems or devices are affected.
Any history of the problem or previous attempts to solve it.
Review Background Information
Gather:
System designs, schematics, and prior EMI/EMC reports.
Equipment manuals and susceptibility specs.
Environmental conditions (e.g., nearby transmitters, power disturbances, machinery).
Develop an Investigation Plan
Define:
What measurements are needed (radiated, conducted, near-field, time-domain).
Tools and instruments to use (spectrum analyzers, oscilloscopes, TDRs, probes).
Identify test point locations and environmental factors to assess.
Conduct Targeted Measurements
Perform on-site tests to:
Identify EMI sources (external or internal).
Map interference paths (how it couples into sensitive systems).
Measure EMI levels vs. system susceptibility thresholds.
Use advanced techniques:
Near-field scanning, source localization.
Time-domain analysis of transient events.
Monitoring under different operating conditions.
Perform Root-Cause Analysis
Trace the exact mechanism causing the problem:
Is it radiated or conducted?
Common-mode or differential-mode coupling?
Ground loops, shielding failure, cable crosstalk, or parasitic coupling?
Correlate findings with system behavior.
Recommend Mitigations
Propose practical solutions, such as:
Shielding improvements.
Filter or ferrite installations.
Grounding or bonding adjustments.
Cable rerouting or equipment relocation.
Design modifications (if needed).
Validate Fixes (Optional but Ideal)
After applying fixes, re-measure and confirm that the interference problem is resolved.
Document the Investigation
Provide a detailed report with:
Description of the problem.
Measurement data and analysis.
Root-cause findings.
Recommended solutions and their technical basis.
Confirmation of resolution (if tested).
Where Are EMI Investigations Used?
Hospitals: When life-critical medical devices malfunction.
Data centers: When servers crash or communication links drop.
Industrial sites: When control systems or sensors behave unpredictably.
Military/aerospace: When mission-critical or safety-critical systems face unexplained disturbances.
Research labs: When precision instruments show unexplained noise or instability.
What’s Special About EMI Investigations?
Highly targeted — focus on solving an active or suspected interference problem.
More advanced tools and techniques — beyond general surveys or inspections.
It requires deep expertise and is often handled by senior EMI/EMC engineers or specialists.
Outcome-driven — the goal is not just to measure, but to explain, solve, and verify
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