The only meter which combines magnetic, electric and radio / microwave detectors in one handheld, compact, portable, time saving, easy to use instrument, allowing fast & accurate coverage of the entire nonionizing electromagnetic spectrum! 3-Axis measurement (three dimensional) & detection of electric and magnetic fields, which allows QUICK scanning of offices, homes, hallways, powerlines and vehicles, etc. Independently measures / detects electric field and magnetic fields and is properly scaled to indicate the full magnitude of currents produced inside a conductive body. Continuous sampling analog readout. Detects either frequency-weighted magnetic fields (two separate scales) or frequency-weighted electric fields in the ELF and VLF range. It has significant sensitivity at 100,000 Hz, well past the 17,000 Hz horiontal scan of video displays. Magnetic and Electric settings measure TRUE magnitude, a feature usually only found on very expensive meters. Shipped directly from the manufacturing facility. One-Year limited warranty and will continue to perform indefinitely with reasonable care! SPECIFICATIONS: Magnetic - Scale: 0 to 100 mG (milligauss) - Minimum Sensitivity = 1 mG - Accuracy: + or - 20% - Frequency Range: 50 Hz to 100 kHz Magnetic Expanded Sensitivty - Scale: 0 to 3 mG - Minimum Sensitivity = .2 mG - Accuracy: + or - 20% - Frequency Range: 50 Hz to 100 kHz Electric - Scale: 0 to 100 KV / m (Kilovolts per Meter) at 60 Hz with
resolution of 0.5 KV / m (1 KV / m = 1000 V / m - Minimum Sensitivity =
.5 KV / m - Accuracy: + or - 30% - Frequency Range: 50 Hz to 100 kHz Radio / Microwave - Scale: 0 to 1 mW / cm2 (milliwatts per centimeter squared) - Minimum Sensitivity = .01 mW/cm2 - Accuracy: -50% or +100% due to reflections off the room and / or user - 50 MHz to 3 GHz A 50 Hz Version of the TriField Meter is available for the Special
Internet Sale Price of $122.99, plus shipping charges - The electrical
wiring / output voltage of non-US countries may require a 50 Hz TriField
model for simpler measurements. TriField 100 XE - Extended Range version of the TriField Meter -
Features ultra expanded Electric Field detection capability of 5 V/m to
1000 V/m (volts per meter) which is 10x the Electric Field detection
range of the standard TriField Meter! - Special Internet Sale price
$139.99 plus shipping (available as either a 50 Hz or 60 Hz model) A new Flat Frequency response version (instead of linear sensitivity increase) of the TriField Meter (as well as the TriField 100 XE Meter) is also available for the same price. Output Jack / Analog Plug Option - Enables analog readout capability -
Allows interfacing the meter to voltmeters, computers, or any device
capable of interpreting an analog output. Maximum voltage is
approximately 300 mV and the output impedance is 10 KOHM - An Analog
Digital Card (available at computer stores) is a necessary item for
meter / computer linkage via the output jack - Available for an
additional 9.50 Tone Alarm - Adjustable volume tone alarm - Can be switched off or set
anywhere between low and high volumes and used as an "Alarm" feature to
warn the user of an existing exposure to a field - Add $60.00 AC Adapter with Connector - Allows one to plug in the meter as an
alternate power supply / source to the 9-Volt battery - Add $25.00 US
(Customers located outside of North America inquire for Connector only
rates, since Adapters for your country are not available in the US) Included 9-Volt battery allows 10 hours of total measurement time. Alkaline battery allows approximately 50 hours of use. Red LEDs Option - 2 red LEDs installed on the meter face for simple
nightime readings when utilizing a flashlight for illumination is
inconvenient - Available for an additional $55.00 (US) ON / OFF Switch for LEDs - LED "backlighting" can be switched on or
off while meter is set to the ON position - Available for an additional
9.50. A Non-Frequency Weighted Version of the TriField Meter is available
for the same Special Internet Sale Price of $122.99, plus shipping
charges. Unidirectional Switch Option - Available for an additional 35.00 -
Narrows the meter's three dimensional (3-axis) detection capability down
to single axis to isolate vertical magnitude sources.UNIQUE ADVANTAGES & FEATURES OF THE TRIFIELD METER
The electric and magnetic settings measure true magnitude, a feature usually found only in more expensive meters. The device is properly scaled to indicate the full magnitude of currents produced by each type of field inside the human body.
Most homes and offices have hot spots with strong artificial electro-magnetic fields, where chronic exposure may cause mental or physical problems. Even the EPA names these fields as suspected carcinogens.*
The Trifield meter has three separate sensors allowing independent measurement of magnetic fields, electric fields and RF or radio / microwave fields. It can help you detect defective equipment, determine safer distances for operating equipment and test better shields around your equipment.
ALPHALAB INC.'S TRIFIELD METER is the Most versatile meter priced under $1,000. It comes ready-to-use with battery, instructions and a limited one-year warranty.
Depending on the position of the knob, the meter detects either frequency-weighted magnetic fields (two separate scales) or frequency-weighted electric fields in the ELF and VLF range. The device has significant sensitivity at 100,000 Hz, well past the 17,000 Hz horizontal scan of video displays. The radio / microwave setting can detect up to three billion Hz (3 Ghz), which lets you gauge radio-wave power, CB and cellular phone equipment, as well as many types of radars.
If you hold the meter in the center of a room and tip it to various angles, the magnetic reading will stay approximately the same regardless of which way you tip or rotate it. The electric reading is similar, although the presence of your body alters the actual electric field, so readings will vary more. The radio / microwave setting reads the full power of radiowaves when the meter is pointed toward the source.
Most of the meters priced below $500.00 read only low-frequency magnetic fields and only in one direction (not true magnitude). The magnetic section of the Trifield meter has three field-detecting coils pointing in the X, Y, and Z directions. A circuit amplifies these signals and gives them the proper frequency-weighting (sensitivity increase linearly from 30 Hz to 500 Hz, with some residual sensitiity up to 100 MHz). A unique network combines the three coil outputs nonlinearly to approximate a true magnitude. The meter is sensitive from 0.2 to 100 milligauss full scale at 60 Hz (or 0.1 to 50 milligauss full scale at 120 Hz, etc.) with a resolution of 0.2 milligauss in the sensitive range. Accuracy is + / - 20% at mid-range. A version with flat frequency response (instead of linear sensitivity increase) is also available for the same price.
Email: EMF Meters
THE EMF BOOK ("What you should know about electromagnetic fields, electromagnetic radiation, and your health") by Mark A. Pinksy - Warner Books
"Leak links power lines to cancer" New Scientist - Edward, Rob -
October 7, 1995, p. 4.
"New warnings on EMF/cancer link" Spectrum - Jan-Feb, 1996 -
No. 46, p. 12.
See reviews of the Trifield Meter in:
Microwave News Microwave News covers the health and safety issues related to exposure to electromagnetic radiation.
SCIENCE NEWS ONLINE - "Hold the Phone? Radiation from cell phones hurts rats' brains" by Kendall Morgan - February 22, 2003 - Page 115 in the hard copy version
National Institute of Public Health of Quebec - New Research indicates Melatonin affected by EMFs - October 15, 2001
SCIENCE NEWS: EMFs in Home May Limit Night Hormone - Melatonin - Oct. 6, 2001; Vol. 160, No. 14
Science News Online, Sept. 23, 2000 Cells profilerate in magnetic fields
Business Week Commentary Cell Phones: We Need More Testing
Science News - May 20th, 2000, Vol 157, page 326- Two Studies Offer Some Cell Phone Cautions - A British review of research gave cell phone safety a guarded endorsement while new findings indicate that radiation from older cell phones can trigger a stress response gene, at least in animals.
INDEPENDENT EXPERT GROUP ON MOBILE PHONES - HOME PAGE
Science News Online Researchers Probe Cell-Phone Effects
EMFs and Human Health
EMF-LINK Provides substantive information on biological and health effects of electric and magnetic fields.
EMF-LINK EMF Marketplace
POWERWATCH - EMF health issues
National EMR Alliance Network News Mission Statement... We believe that electromagnetic radiation (EMR) is hazardous to life and constitutes a significant threat to the public's health...
Swedish Association for the Electrically & VDT Injured You will find information in English and/or Swedish about electro-sensitivity, formerly known as "Electrical Over-sensitivity" or "Electrical Hypersensitivity" phenomenon. We try to build a reference database for this area of research that you can search or download. Information about the FEB association in Sweden is available in English, as well as addresses to similar associations worldwide. A few more popular articles are also available. We also intend to keep summarized reports on current research.
Alzheimer's Risk Prolonged exposure to electromagnetic fields may increase Alzheimer's risk
Health Protection Agency - Radiation Protection Division
Science News Online (11/29/97): Magnetic fields can diminish drug action
Science News Online (11/20/99): "Powerlines Rewire Avian Hormone"
Science News Online (1/10/98): EMFs' Biological Influences: Electromagnetic fields exert effects on and through hormones by Janet Raloff