The 686 Series vibration switches combine the reliability and durability of electronic switches with the ease of use and application of mechanical vibration switches. You do not need a separate power supply and no mechanical parts are needed to set the limit. The patented MAVT® process allows adjustment of the switching threshold during operation. The vibration switch can thus be installed on a running machine and set without switching off the machine to be monitored. Critical machines such as pumps, motors or fans can now be easily monitored without complex installation procedures.