Downloadable EMF calculator

Ofcom is the British organisation looking after all forms of communications in that country, including wireless devices like cordless phones, walkie talkies plus even some car keys and doorbells. It even keeps an eye on the Royal Mail.

On its website it has uploaded an EMF calculator for the purpose of assisting spectrum users to assess separation distances required for their own radio equipment. It is to help licensees assess compliance with the EMF licence condition.

Downloadable by anyone, it is easy to enter basic parameters of the radio system, such as radiated power, maximum time transmitting in any six-minute period and frequency, into the calculator. The spreadsheet will calculate a separation distance to be maintained between the radio equipment and members of the general public in order to demonstrate compliance with the British regulation.

To download the Excel spreadsheet EMF calculator, click here. The calculator does not currently cover frequencies below 10 MHz.

The calculator has been designed to allow licensees to simply and easily assess compliance, without the need for technical knowledge. It therefore uses simplified assumptions and will produce conservative results. In some cases, it may significantly overestimate the separation distance; for a more detailed analysis the organisation recommends using a detailed technological tool or seeking help from a professional installer.