Tag Archives: emf testing

EMF Testing Indoor Air Quality Radon Gas Testing: 214.912.4691 Dallas – Houston – Austin – Fort Worth

Powerline Home Safe Distance Cell Phone RF Surveys

Cell Tower Site on High Voltage Power Line near homes in residential area in North Dallas – EMF Testing and Surveys

EMF Testing / Magnetic Field Survey & Safe Distance Measurement Services

EMF testing for those concerned about living near powerlines and feeders is available for commercial clients and large scale residential with reports that range from verbal to complete reports with photo documentation and graphics. We also provide consultation on viable strategies and products for EMF protection. We travel all over Texas and cities in adjacent states including Dallas, Houston, Fort Worth, Austin, San Antonio and Oklahoma City.

Implanted Biomedical Device EMF / EMI Measurement Compliance Surveys and Testing for Patient Safety

Medical Device Compliance Testing (Pacemakers, Implantable Defibrillators, ICD’s etc. – Medtronics, St. Jude Medical, Boston Scientific, Mortara) for individuals returning to work or home after implant surgery to identify potential hazards from AC/DC Magnetic and Electric Fields, Microwaves, RF and general EMI (Electromagnetic Interference).

RF (Radio Frequency) Scans and Evaluations – Maximum Permissible Exposure (MPE)

We test RF energy for frequency and amplitude in order to find sources and evaluate safety with respect to FCC regulatory, compliance and precautionary guidelines, and to determine potential interference issues between wireless routers, cell phone repeaters / boosters, Radio Frequency Identification (RFID) systems, and wireless microphone / audio / video data systems.

Magnetic / Electric / RF & EMF Shielding Consultations including proper grounding

If you have an issue with electromagnetic energy that is either a safety issue or causes equipment interference, we are fully qualified to assess, troubleshoot and make sound recommendations to fix or mitigate the situation.

Radon Gas Measurements & Surveys (Short / Long Term Testing)

With a background in radon and radiation safety, we are capable of evaluating and reporting on radon gas levels, how they compare with EPA standards and whether a mitigation solution is called for. This is now a common requirement for HUD, Fannie Mae, Freddie Mac, structures that fall under GSA guidelines, etc.

EMF Testing for Electrical Wiring Issues Indicated by Excessive EMF Fields

Whether you believe in the safety hazards of EMF or not, the most common source of high EMF fields inside the home is improper wiring which fails to conform to current NEC code. ScanTech can detect and direct repairs on electrical wiring that manifests as an abnormal magnetic field.

Preliminary Construction Surveys / Property Transfer Phase I Environmental Site Due Diligence Survey testing regarding Indoor Air Quality (IAQ) – EMF Consultation for Safety and potential EMI – Radon Testing for Multi-Family Dwellings and Commercial Buildings.

We are often called out to site before a structure or complex is erected in order to survey and communicate any possible issues and the potential impact of nearby power lines, substations, transformers, cell towers and other EMF/RF generating sources. We also make construction recommendations for minimizing electromagnetic field emissions for safety and electromagnetic Interference concerns with sensitive manufacturing and research equipment.

Indoor air quality testing for VOC levels regarding Certificate of Occupancy permits according to City of Dallas Green Ordinances. Also known as the 804.2 Post-Construction, Pre-Occupancy Baseline IAQ Testing which is a 4 hour test for 500 uG / m^3 or less of VOCs.

Magnetized & Radiation Contaminated Metals, Stone and Imported Products

ScanTech has been in the radiation survey business for over 10 years and is routinely called upon to investigate cases of suspected radioactive contamination and magnetized ferrous metals which can cause unusual issues. Our instrumentation includes several Geiger counters with capable of detecting Alpha and Beta particle emissions, X-Rays and includes specialized Gamma radiation scintillation detectors.

Weak Cell Phone Signal Reception Issues & Wireless LAN Problems / RFID Interference

Weak Cellular Phone (including 2G / 3G / 4G LTE) & Wireless Strength Measurements with consulting for correction / mitigation in commercial buildings, residential and multifamily properties with poor coverage, slow data rates and dropped calls for all major telecom and communications carriers including Sprint, T-Mobile, Verizon, AT&T for smartphones, tablets, iPads, etc. Radio Frequency Identification system troubleshooting and interference issues investigated. We also perform FCC RF Compliance surveys for MPE (Maximum Permissible Exposure) including rooftop antenna installations.


Hospital Infant Anti-Abduction Security Systems

ScanTech troubleshoots RFID integrated systems designed to protect neonatal care facilities that employ systems such as Hugs by Stanley Healthcare and MyChild by McRoberts Security Technologies.

Electrostatic Discharge (ESD) Testing, Consulting And Evaluation for Commercial, Industrial and Biomedical Companies / Applications / Clients

We have the equipment to determine the sheet resistance of ESD flooring material and if anti-static grounding is working as well as the ability to identify troublesome materials and processes which can cause equipment malfunction and electric shock / fire / explosion hazards. We can also measure relative air ion counts, humidity and the direct DC static voltage on surfaces (positive or negative) up to 30,000 V to determine which objects in the environment may be damaging your static sensitive equipment.

Indoor Air Quality (IAQ) Surveys to Determine Relative Air Cleanliness PM2.5 / PM10 / HEPA Filtration Efficiency / Formaldehyde / VOC / CO2 (Carbon Dioxide) / O2 Oxygen % Concentration & Contamination for Commercial Building and Industrial / Occupational Atmosphere Evaluations with expertise in Nanotoxicology and Medical Environmental Illness Testing

We have time based datalogging air laser analysis available to characterize particulate matter such as small particle contaminants (down to 0.5 microns such as bacteria) and large particle counts (2.5 um and larger) for potential pollen, dust and mold detection which are also known as RSPs. (Respirable Suspended Particles) We can also check for formaldehyde concentrations and VOCs (Volatile Organic Compounds) levels from outgassing materials such as pressed wood flooring or glues and other binders.

Elevated CO2 (carbon dioxide) levels are indicative of Sick Building Syndrome and poor air exchange characteristics in a structure.

New nanomaterials on the market have raised concerns about the potential toxic effects of nanoparticles (such as carbon nanotubes, titanium dioxide, silver NPs, etc.) in particulate, aerosol, aqueous forms and their in-vivo effects.

Commercial, industrial, occupational health and large scale residential applications.


OSHA Sound / Noise Level Surveys for Safety Audits

Sound (Commercial) & Industrial Safety field surveys and measurement including for acoustic OSHA sound and STC (Sound Transmission Class) noise levels / ordinances / testing (meeting ANSI & IEC Type 2 standards) to determine compliance and evaluate potential issues with excessive or disruptive noise.

Photometric Glare & Illumination (Lighting Level) Surveys for Safety, OSHA and City Ordinance Compliance

Photometric mapping for Certificates of Occupancy, (CO) identifying poor / insufficient / excessive illumination, security camera glare, ATM lighting security assessments, ADA lighting requirements / compliance, and privacy. Many cities have enacted ordinances which limit the amount of light emanating at the property line at night in foot candles. (fc) We can also measure lighting flicker rates which can cause headaches and other performance issues as well as evaluate possible disruption of circadian rhythms which lead to insomnia and lack of restful REM sleep.

Metallurgical Analysis & Consulting

Materials analysis for ferrous / non-ferrous metals / alloys. Tools and tool steel quality evaluations for carbon content. Also magnetic / RF / electric shielding capability, corrosion resistance, heat resistance, degree of temper, quench methods, elasticity, weathering, and electrical quality consulting. Metamaterial composite research for nanotechnology, biomedical, and exotic applications. (graphene, nanoparticles, carbon nanotubes, nanodiamond, etc.) Radioactivity testing for scrap metal or other suspected products.

Using the Wrong EMF Meter for EMF Testing and Home Inspections: A Case Study in Professional Judgment

EMF Inaccuracy Analog vs. Digital

EMF Meter Comparison for Home Inspection with SIGNIFICANT DISAGREEMENT in magnetic field readings

I always find it both interesting and gratifying when clients who hire me already have their own meter and yet are willing to pay an additional fee to interpret the results. They will call and express concern about either a home they are considering purchasing or one they are already occupying as they are alarmed at the high readings they see on the EMF meter they purchased.

What instigated this post is two separate clients a week apart who both purchased a Trifield 100XE analog EMF meter and got readings that indicated a field of 100 milliGauss or greater. I was a bit skeptical of this being true and for good reasons:

1) It was based on my long experience in doing EMF testing and surveys in the Dallas/Fort Worth area.

2) And what I know about using something other than a high quality meter for making a decision on something as important as where you and your family including children plan to live for the next 5 – 20 years.

Now, I am not putting down either the meter, the manufacturer or the homeowner for using this type of meter for a professional inspection. But as you will see in the story I tell, it is more than worth the money to have an expert opinion as a “sanity check” because of the likelihood that you can either get a false positive or a false negative as it were.

As you can see in the above picture, the 100XE is set to the 0 – 100 mG scale and is nearly pegged at 100 mG. The digital reference meter I use shows nowhere near that level at 7.49 milliGauss. That error is off by more than an order of magnitude which means that the Trifield is reading more than 10 X the amount that is actually present. And yes, my meter is calibrated as I periodically check it against another meter.

In this case, if the homeowner had merely relied on the meter they purchased online, it would have potentially meant that they would have passed up a home they might have been otherwise happy with based on erroneous information. This is more time and hassle for them, the seller, agents, etc. all based on a faulty needle indication.

EMF Meters Home Inspector

Two Analog Trifield Meters compared with a digital reference meter

The second case came a week later with another Trifield 100XE on the scene. In this case, it was not nearly as inaccurate, but it still reads 2.5 mG while the reference meter reads just under 1 milliGauss. Not as dramatic, but still enough difference that a family with young children might have shied away from this property when it was not really an issue.

Now as an aside, take a look at the reading of the Natural EM Meter (blue label) to the right. This is one of my personal meters and it reads low at less than 0.5 mG. More accurate, but it is still reading lower levels than what is actually present. So why do I even use this meter? Because one thing I do like about analog meters is that they are good for seeing trends and odd fluctuations – but I never use them for absolute values on a survey.

You may think I am saying the Trifields are not any good, etc. but they do have their uses as long as you understand their accuracy limitations. To be blunt, the reason these have become so popular is because of the interest in the paranormal and ghost hunting fields and the ways in which they can be customized with outputs, alarms, backlighting, etc. but these features are not of direct use to a serious prospective homeowner or professional EMF inspector. There is more commentary on this in the following post regarding a technical conversation I had with the manufacturer.

At the end of the day, a proper EMF inspection is about more than just reading a meter; it is about having judgment and recognizing errors when they do not fit with conventional experience and wisdom. It is about being knowledgeable about the different kinds of meters, single axis vs. triple axis, true-rms averaging and how the frequency range of an individual model of meter can weight the readings differently. It is also about risk assessment, diplomacy and seeing a larger picture than just a scary needle sweeping across a meter face.