Home > Power > Mains plugs, sockets & adaptors > Mains testers > Elfix Polarity Tester
Elfix Polarity Tester
Upgrade your purchase with these options:
Delivery is charged at cost.
Equipment powered by the mains generates an electromagnetic field (EMF). In our experience, the smaller the EMF, the better the performance of your Hi-Fi or Home Cinema system.
The Elfix tester is particularly useful for measuring EMF generated with equipment that is powered by a figure-8 mains lead. It allows you to identify which way round to connect the figure-8 plug and generate the lowest EMF.