ALL-NEW MODEL JUST INTRODUCED ... 100 TIMES STRONGER THAN BEFORE!



The Trifield Meter is a gaussmeter, electric field meter, radio field strength meter in a single until. When measuring electromagnetic fields (EMF’s), the primary concern is usually magnetic fields, which can be tricky to measure. If a less sophisticated 1-axis gaussmeter is used, a reading of zero could result even where the field is strong. A 1-axis meter must be oriented correctly to measure the field (which is a vector). The 3-axis Trifield Meter solves that problem by measuring the true strength of the field regardless of which way it is oriented. Therefore, the Trifield Meter can be scanned rapidly across an area without having to stop at each point to search for the orientation that gives a maximum reading. Another section of the meter detects AC electric fields, which can exist independently of AC magnetic field. The third section detects radio/microwave, such as from a leaky microwave oven.

Product Features:

Detects the three type of electromagnetic pollution: AC magnetic fields, AC electric fields, and radio/microwaves.

AC magnetic and electric fields are 3-axis, allowing quick accurate readings regardless of meter orientation.

Two magnetic ranges cover 0.2-100 milligauss.

This is sufficiently sensitive to detect the background field almost anywhere (except for from civilization), while measuring up to very strong AC fields.

Electric range covers 5-1000 V/m (this is 10x stronger than the original Trifield Meter)

Radio/microwave covers 10 to 1000 microwatts/square cm which includes the maximum permissible public exposure levels in all countries.

Operates about 40 hours on replaceable standard 9V battery, has a low battery indicator.

Analog (needle-type) display has very fast response time compared to digital.

Product Applications:

Measures AC (artificial) magnetic fields rapidly. (Does not measure DC of static fields, such as the Earth Field.

Measures AC electric fields rapidly, such as from overhead power lines or improperly grounded equipment. Can locate wiring in walls.

Measure major RF/microwave sources such as leakage from microwave ovens, or the field near cell towers. (Note that wireless internet transmitters and individual cell phone are designed to emit very little power and usually are well below international RF exposure threshold. Consequently, the Trifield Meter will only detect these it very near the source.)

USING THE TRIFIELD METER

A knob on the front has six positions: OFF, BATTERY TEST, two MAGNETIC field sensitivities (0.5-100 milligauss at 60 Hz, and 0.2-3 milligauss at 60 Hz, the second sensitivity to measure weak fields more accurately), ELECTRIC field and RADIO/MICROWAVE power density. The meter face is analog (needle type). A needle reading of one-third of full scale corresponds to either 3 milligauss (or 0.6 milligauss) @ 60 Hz, 3 kilovolts/meter @ 60 Hz, or 0.04 mW/cm2 respectively in the magnetic, electric, and radio/microwave field settings. Long-term personal exposure to levels higher than these should probably be avoided, so the meter is labeled "HIGH" above these levels. Unfortunately, because of uncertainty of population studies, any true health-effect threshold may be as low as 1 milligauss or as high as 10 milligauss.

MAGNETIC FIELD DETECTION

In most homes or offices, some areas are "hot" spots with readings in the HIGH range. Most often, this is caused by magnetic fields, which come largely from unpaired internal wiring. (Contrary to popular belief, power transmission lines and transformers do not generally contribute as much magnetic field as does internal wiring.) Other magnetic sources include video displays, motorized clocks and other equipment, electric blankets and heaters, fluorescent lights and light dimmers, and the transformers that are inside consumer devices. Many of the effects are from frequencies that are harmonics or multiples of 60 Hz (120 Hz, 180 Hz, etc.) and 17,000 Hz of video displays. Cars (especially near the front floorboard of electronic ignition cars) and motorcycles have fairly strong fields that are at frequencies higher than 60 Hz. Magnetic field is difficult to shield, but sheet steel is somewhat effective.

ELECTRIC FIELD DETECTION

A few areas in most homes read HIGH in the electric field setting. These include areas near improperly grounded equipment, the front of video screens, and fluorescent lights. Most of these fields can be easily shielded using a grounded metal screen or foil; VDT screens of this type are readily available. You can greatly reduce the strength of an electric field just by placing your hand in front of the source. This effect can be seen using a TriField meter.

MICROWAVE DETECTION

Occasionally, certain areas read HIGH in the radio/microwave setting. These include door seals around microwave ovens, and cellular phones (but not regular radio phones, which are very low-power). Radio/microwaves can be shielded in the same way as electric fields, although the lower frequency radio waves are not shielded by your hand as easily as microwaves are. (Metal screens will shield both.) In the United States, radars and FM transmitters can legally expose residents to moderately high power levels (as high as 10 mW/cm2 briefly), but such exposure is not common.

AVOIDING RISK

By seeing "hot" spots in your home and office, you can move furniture, cribs, or beds to reduce exposure. You can also take corrective action to avoid long term exposure to appliances that emit high electromagnetic pollution levels. If you have unusual sensitivity to a particular type of field, you can identify where problems exist. Wearers of pacemakers should avoid even brief exposure to high radio/ microwave power levels. Some evidence suggests that brief exposure to very high AC electric or magnetic fields may cause nervousness or seizures in some people.



Product Specifications:

AC Magnetic Fields (3-axis; shows true magnitude):

Frequency Range: 40 Hz – 100 KHz (see frequency weighting)

Accuracy @ 60 Hz (50 Hz): +/- 20% of reading

Range/Resolution (@ 60 Hz or 50 Hz): 100 milligauss / 0.2 milligauss

Standard Version Frequency Weighting:

*Sensitivity is proportional to frequency from 40 Hz to 500 Hz; flat from 500 Hz to 2000 Hz

*Sensitivity is inversely proportional to frequency from 2K Hz to 100K Hz

Flat Frequency Version: +/- 20% from 50 Hz to 500 Hz; inverse frequency above 500 Hz

AC Electric Fields (3-axis; however, note that E-field is affected by the body position):

Frequency Range: 40 Hz – 100 K Hz (see frequency weighting)

Accuracy @ 60 Hz (50 Hz): +/- 30% of reading

Range/Resolution: 1000 V/m / 5 V/m (Original Version was: 100 KV/m / 0.5 KV/m)

Frequency Weighting:

Same as magnetic (above).

RF/Microwave Field:

Frequency Range: 50 MHz – 3000 MHz (3 GHz)

Range/Resolution: 1 mW/cm2 / 0.01 mW/cm2

Accuracy: ½ x to 2 x of reading

Meter Size: 5.0 x 2.6 x 2.4 in (129 x 67 x 62 mm)

Weight: 8 oz

Battery: 9 volt alkaline (~ 40 hour life) / "Low Battery" indicator

For 60 Hz U.S. Current only. Includes 1-year limited warranty, 9V battery, and instructions. Made in USA.