E-meter:

Computer users may have noticed that nowadays there are guidelines as to the limits of radiation a monitor may produce. This is sensible since there are people who believe that high field strengths may adversely affect our well-being. It is a fact, however, that, although we all find ourselves constantly in electric fields, wherever we are in the world, there have as yet been no reliably reported and proven cases of harm to the health of a human being. Nevertheless, most major manufacturers of computer displays make sure that their monitors meet MPRII/MPRIII Recommendations (although these are not mandatory anywhere). Put your mind at rest by ascertaining for yourself that the radiation of your monitor is well below what is believed to be a safe level.