SW-2805 - ESAW Melde's Apparatus  (OSAW Pattern) 

This massive and powerful fork which has a frequency of approximately 60 vibrations per sec., is ideal for producing standing waves and is mounted on a heavy cast iron base. An electromagnet is arranged between the prongs of the fork without touching it. A small spring type strip is attached to one of the prongs. A screw just makes a contact with this strip. Supplied with scale pan, bench clamp with pulley but without weights