Energy Guide

EMF & RF Safety Levels - A Comparative Guide ScanTech
www.scantech7.com 214.912.4691
RF Levels & Safety
OSHA 1910 Subpart G 1910.97 Occupational health and environmental control Non-ionizing radiation
The exposure limit in this standard (10 mW/sq. cm.) is expressed in voluntary language and has been ruled unenforce-
able for Federal OSHA enforcement. The standard does specify the design of an RF warning sign.
For PCS antennas, the 1992 ANSI/IEEE exposure standard for the general public is 1.2 mW/cm-sq
For cellular phones, the ANSI/IEEE exposure standard for the general public is 0.57 mW/cm-sq
ICNIRP standard is 0.40 mW/cm-sq for cellular phone frequencies and 0.90 mW/cm-sq for PCS phone frequencies
NCRP guideline is 0.57 mW/cm-sq for cellular phone frequencies and 1.00 mW/cm-sq for PCS phone frequencies
C95.1 - 1999 IEEE / ANSI Standard 1 mW/cm^2 controlled environment 0.2 mW/cm^2 public averaged over 6
minutes
IEEE guidelines legally enforceable vary by frequency (10000 / frequency^2)
Pacemaker Manufacturers
Guidant 5.2 mW / cm^2
Medtronics 2.6 mW / cm^2
Massachusetts adopted IRPA recommendations 200 microwatts/ cm^2 SAR 0.04 W / kg
Kirkland AFT Portland, Oregon 100 microwatts / cm^2
Soviet Union 1 microwatt / cm^2
Humans absorb most radiation between 30 - 100 MHz and especially between 77 - 87 MHz.
SAR for cell phones - SAR stands for Specific Absorption Rate, which is the unit of measurement for the amount of RF
energy absorbed by the body when using a mobile phone. Energy absorption from RF fields in tissues is measured as
a SAR within a given tissue mass
The unit of SAR is watts per kilogram ( W/kg )
RESOURCE LINKS FOR LOOKING UP THE SAR RATINGS OF VARIOUS CELL PHONES
http://www.mmfai.org/public/sar.cfm
www.fcc.gov/oet/fccid
FCC CELL PHONE RADIATION STANDARDS
North American Standard 1.6 Watts per Kg averaged over 1 gram of body tissue
European Standard 2.0 Watts per Kg average over 10 grams of body tissue
Safety factor of 10 later added to create a 0.4 W / kg standard
NCRP recommends 0.08 W / kg
A typical 802.11b wireless network card will transmit at around 30 milliwatts (a few 100mW and 200mW cards out there)
and operates in the 2.4 GHz frequency band. Current FCC regulations limit power output to 1 Watt EIRP (Effective Iso-