EMF meters can be purchased with standard needle, digital or LED indicators. Readouts are given in milliGauss. An average television will read 4 to 8 mG and the base reading of a room (uninfluenced by devices) will be very low, between 0 mG and maybe .3 mG.
Different meters will detect either AC or DC electrical currents. Those that detect AC will give readouts for devices in the home (many of which work off of AC). DC will give you readouts on natural fields. Either will work, but if you use AC, you must learn to distinguish between a field given off by an explainable source and a paranormal one.
“Cell sensors” were originally intended to find cell phone signals and are useless as paranormal tools without the appropriate attachments. ELF meters are budget models of EMF meters. They have LED lights that indicate field strength with no needle or digital display to indicate exact milliGauss.
Trifield meters measure magnetic, electric and radio/ microwave fields. They will also pick up fields from electrical devices and they are extremely sensitive. Trifield natural EMF meters detect the same three kinds of fields as regular trifield meters, but only from natural sources, not man- made devices. You cannot walk about the room freely with these meters. They must be used in combination with a compass and the room must be surveyed in a north- south direction. These meters are so sensitive that they can pick up fields from living beings, including humans and pets. Because they are so sensitive, they are best used on the magnetic setting.
We have chosen to use a Sperry EMF tester (model EMF-200A). This device has an LCD digital display with a range from .1 mG to 199.9 mG. Its bandwidth is from 30 Hz to 400 Hz. It works on one 9V transistor battery. The Sperry operates in 32°F to 122°F (0°C to 50°C) at 80% relative humidity and from 0°C to 35°C in 90 % relative humidity. It measures 5.2” high, 2.8” wide, 1” deep and weighs approximately 5.8 ounces.
