Tag Archives: weak cell signal

EMF Biomedical Implant Surveys Indoor Air Quality Testing: 214.912.4691 Dallas – Houston – Austin – San Antonio – Fort Worth

EMF Surveys, Indoor Air Quality Testing, Photometric Surveys, Dallas Green Building Clearance Surveys 804.2, RF Radiation: 214.912.4691 Houston – Austin – Dallas – San Antonio – Fort Worth

Powerline EMF Safe Distance Cell Phone RF Radiation Surveys

Cell Tower Site on High Voltage Power Line in Houston, Austin, Dallas – EMF Testing and Surveys

 * ScanTech does not perform residential testing for homeowners and tenants – all services are COMMERCIAL ONLY –  HOMEOWNERS & RESIDENTIAL CLIENTS CLICK HERE


EMF EMI Surveys Consulting

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, Amarillo, Lubbock 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, Nevro, Tandem Diabetes Care) 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).

Dallas Green Certificate of Occupancy Indoor Air Quality (IAQ) Testing for 804.2

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.

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 such as in medical imaging, 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 multi-family housing (apartments) and nursing / memory care facilities that fall under HUD, Fannie Mae, Freddie Mac. Also government buildings and structures that fall under GSA guidelines, etc.

EMF Testing for Electrical Wiring Issues Indicated by Excessive EMF Fields (Residential Service Discontinued)

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.

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. Radioactivity testing for scrap metal or other suspected products.

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 0.3 microns ~ smaller than 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.

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, OSHA & ADA lighting requirements / compliance, and privacy. Many cities (such as McKinney, Plano, Frisco & Grapevine) 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.

Nanotoxicology Safety Consulting

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.

Metamaterial composite research for nanotechnology, biomedical, and exotic applications. (graphene, nanoparticles, carbon nanotubes, nanodiamond, etc.)

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




Weak Cellular Phone Reception: Why and What you Can Do About It

Cell tower survey, weak cellular reception

Weak or no cellular signal

One bar.

Or none.

The frustration of being in an out of service area, dropped calls, intermittent voice communication, slow download speeds… all issues we have experienced at one point or another. If you happen to work or live in a “dead zone”, then it can be exceptionally inconvenient to pay for a service which is inadequate for your needs.

So with all of the cellular towers that seem to be around, why does this scenario keep occurring into the 21st Century? There are several reasons:

Your carrier may not have particularly good coverage in areas you need your phone to work. In my surveys, I have definitively found that some cell phone companies have invested more in their infrastructure than others.

Your location may be in a non-ideal area geographically with respect to the cell phone signal such as in a valley or a heavily wooded area. In valleys, the signal from cell towers tends to pass overhead and/or is shadowed by the terrain. Trees and foliage have leaves which contain water; water tends to absorb cellular tower radiation (which is how your microwave oven works) and attenuates (weakens) the signal. Older neighborhoods with large trees tend to have more issues than the newer, wide open suburbs.

Inside certain buildings, there may be certain building materials including thick glass, stucco and metal in the structure walls and ceiling to act as RF shielding or significantly weaken the indoor signal. This is why getting closer to a window or stepping outside can make a significant difference. Have you ever noticed how you almost always drop a call inside of an elevator when the doors close? That is because you are effectively inside of a Faraday Cage, which is engineering talk for an enclosure which blocks off virtually all radio frequencies. Also, in a downtown area, large buildings can “shadow” you from a cellular repeater and lower the signal strength.

Your phone itself may not have the best reception which could be due to everything from a poor signal to noise ratio, insufficiently sensitive receiver, internal noise, etc. One big difference is that cell phones now rarely ever have external antennas which are almost always superior to the internal ones hidden inside on a printed circuit board. Why were they done away with? Some of it probably has to do with aesthetics, others practicality, (who wants a piece of wire that can snag on a pocket) and mostly I believe it was a warranty issue with the manufacturers.

With a relatively thin piece of metal sticking out, how many times do you think consumers brought their phone in because of a broken antenna? This costs the manufacturer if under warranty, downtime for the customer, etc. Personally, I wish the option to hook up an external antenna for areas of unusually poor reception were present, but that will probably never happen with the exception of repeaters. (discussed below)

Certain times of day and areas may experience high call / data download volume and use up available bandwidth. If everyone is trying to call using the same cell site, it can get overloaded which is why you get an occasional voice message telling you your call cannot be completed.

So what can be done?

Some of the obvious choices are changing carriers and/or researching phones for better reception. You can also get repeaters that are either specific to your carrier or will work with multiple carriers. Many phones can now be set to Wi-Fi calling, (and borrow the local Internet connection) but I find that sometimes my phone works more reliably if I leave it off as an open wireless connection may not always be available. (and tends to force some models into an annoying hunting loop that disrupts communications) If you really need to get a message to someone, text is far more reliable than voice. Why? Because voice calling requires a continuous stream of data and bandwidth in real time that is relatively error free, while a text message takes up far less bandwidth to send and can be reassembled in order that not dependent on happening in “real time.”

Another option, particularly for commercial applications and clients is to contact ScanTech regarding your needs for an cellular strength survey and evaluation. We cover all major carriers such as Verizon, AT&T, Sprint and T-Mobile and offer a variety of ways to assess what is causing the issue and how to best address it.