Why do the EMFields Pro and the Gigahertz 3030b give different electric field readings?
The EMFields Pro and the Gigahertz 3030b appear to give quite different electric field readings, with the 3030b presenting a figure roughly twice that of the Pro. This is not a calibration error or inaccuracy, but instead a different method of measuring the electric field. The 3030b is designed to measure the electric field at the end of the instrument in direct relation to ground. This is why they recommend using the earthing lead they provide with the instrument, and doing so is required for your measurement of the electric field relative to ground to be accurate. The Pro is designed to measure the electric field level to which your body is exposed, so it is relative to your body, instead of to ground. For example, birds can perch on very high-voltage powerlines without being injured. This is because they only have a low number of Volts across their body. However, they are technically sitting at hundreds of thousands of Volts. In this situation, the 3030b would read hundreds of thous
