The UK version of the renowned Stetzer Filter is robust, fully tested and EC mark-approved. It has been specially engineered for 230V 50Hz (ie UK mains electricity).
Each home or office takes between 3 and 15 filters to reduce the GS units of dirty electricity, ideally down to 30 for people who are electromagnetically sensitive (ES), or down to 50 for others.
To ensure that you get the best results with your filters, we recommend that you either buy a Stetzer Microsurge meter (or get a free one, with one of the filter packs shown below!) or arrange a survey for installation of the filters. Measuring with a filter determines the optimum positions and quantity of filters to minimize the GS units of dirty electricity.