AC Gaussmeter, Electric Field Meter, RF (radio Frequency) Field Meter Combined in one Electromagnetic Instrument
The Tri-Field Meter - An excellent tool for those curious about EMF Fields in their home (or for electricians).
There were 2 versions, including the standard version and an extended sensitivity version—we are now only selling the extended version at a lower price ($320) as it is better value for money.
The TriField ® Meter combines all the features needed for fast, accurate measurements of electromagnetic fields. It independently measures electric field and magnetic field, and is properly scaled to indicate the full magnitude of currents produced by each type of field inside a conductive body. As a result, it "sees" much more than any other electromagnetic pollution meter.
Depending on where the knob is set, the meter 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 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, and many types of radars.
This meter is the only one which combines magnetic, electric, and radio/microwave detectors in one package, so that the entire non-ionizing electromagnetic spectrum is covered.
In addition, the magnetic setting and the electric setting measure true magnitude, a feature found elsewhere only in more expensive meters. 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.
Surprisingly, the standard TriField Meter is one of the least expensive meters available. The few other meters below $300 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 increases linearly from 30 Hz to 500 Hz, but with some residual sensitivity 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.
The TriField Meter comes with a one-year warranty and a 9-volt transistor battery included. This type of battery lasts about 10 hours (total measurement time). When the BATTERY TEST reads low, the battery can be replaced with any rectangular 9 volt transistor or alkaline (which lasts about 50 hours) type.
The Extended Sensitivity version of the TFM
For 60 HZ sine waves, the magnetic field settings on the knob (0-3 and O-100) are correct as shown; however, sensitivity at low frequencies has been enhanced. Sensitivity at s Hz is 1/3 the sensitivity at 60 HZ. (The regular TriField meter is approximately l/l00 as sensitive at s HZ compared to 50 Hz). This allows the meter to detect slow-moving static magnetic field sources. For 50 HZ sine waves on the electric field setting, this meter is lOOx as sensitive as the regular TriField meter. The range is therefore 0-1 KV/meter or 1-1000 volts/meter if you are reading power lines (50 Hz). Multiply the reading on the top scale by 10 to get volts/meter. For example, a mid-scale reading when the knob is set at "ELECTRIC", would mean 80 volts/meter. This is sufficient sensitivity to detect slow-moving static charges. All instructions are included with the meter.
Cost is $320 plus p&p of $10.
Note: See below for our home version for checking EMFs and magnetic fields—it shows with coloured LEDs the level of safety at any place: green/orange/red, and is much cheaper at $120.
OSUN SIMPLE RADIATION FINDER
A low-cost meter for finding emf hot spots
The unit operates with 3 coloured LEDs to indicate whether a site is safe (less than 2.5mG), or requires caution (2.5 to 8 mG) or is dangerous (over 8mG). It shows up the status of both AC magnetic fields and microwaves in the vicinity.
This is a meter that anyone can use with confidence immediately.
Covers 50 Hz – 3 GHz. Requires 9V battery. 1 Year warranty.
