|This slightly more expensive than your average EMF meter but there’s a reason for it. It is the best portable meter out there. Normally EMF meters pitched at the ghost investigator are single axis. It means, however, that you may be missing an EMF source or not getting the level of accuracy required for solid conclusions. This particular meter ensures highly accurate measurement and, although it comes with the means to connect it up to a PC for constant data logging, when used stand-alone its internal memory can store up to 1,999 individual 3-axis magnetic field measurements, together with the date and time they were stored. In my opinion it’s an essential piece of kit.