The Magnet Museum is a private museum in Dortmund-Aplerbeck, owned by the company Tridelta. The exhibition provides an overview of historical and current applications of the permanent magnet in electrical engineering. In the museum, the use of permanent magnets in counters, speakers, telephones, switches, relays, clocks, measuring devices, small motor…The Magnet Museum is a private museum in Dortmund-Aplerbeck, owned by the company Tridelta. The exhibition provides an overview of historical and current applications of the permanent magnet in electrical engineering. In the museum, the use of permanent magnets in counters, speakers, telephones, switches, relays, clocks, measuring devices, small motors and generators are illuminated in the museum.