Review: Tri-Field Natural Meter
Price: $195 base model
LED illuminated display
These devices have been around a long time and for good reason -- they are high quality precision instruments. Mine is 7 to 10 years old and will probably still be working 10 years from now!
The reason for using a Tri-Field Natural Meter is to detect magnetic fields of natural origin. Why is this important? You will also be using devices like Ghost Meters which also detect EMF fields, but the Tri-Field Natural Meter ignores man-made sources and this is important. I use several Ghost Meters spread throughout an area of interest -- these devices are inexpensive, so simultaneous coverage of a large area is possible. When EMF fields manifest in areas where none should be present, the Tri-Field can be placed in the areas affecting the Ghost Meters. This does several things for the ghost hunter; if the Tri-Field Natural Meter also goes off along with the Ghost Meters, it means the source is not man-made. If only the Ghost Meters are triggered and the Tri-Field Meter remains unaffected, the area should be checked for man-made sources.
During a past investigation, while in a haunted building without electricity we placed Ghost Meters along the length of a long bar. During this EMF disturbance the meter closest to the kitchen went off. It stopped, then the next meter on the bar (about 4 ft from the first) went off. This soon stopped and then the next meter down the bar went off. This continued to the Tri-Field Natural Meter setting if off, stopping and this continued until it reached the Ghost Meter at the far end of the bar. Some unseen magnetic disturbance moving at walking speed had traveled the length of the bar before terminating. This is an example of effective use of these meters.
When you use these meters, I would recommend not using the Tri-Field Natural Meter as a hand-held mobile meter -- they are so sensitive that they can detect tiny levels of EMF from the human body. Best to set it up in a stationary position and let it settle down to a natural zero level for the environment.
These are high quality devices which can last forever if you are careful not to drop them.
They have an audible sound to alert you to the presence of EMF fields, but custom versions from some dealers offer internal background lighting for viewing in the dark.
The AC power and output jack are also useful.
Build Quality 9
Ease Of Use 8
Battery Life 10
Weaknesses: audible alarm is not very loud and not adjustable. Not well suited as a mobile device.
Both Alpha Labs and Ghost Stop sell this model, but only Alpha Labs offer the custom upgrades.