Cover, Material: Rugged ABS plastic, For E/M Apparatus, Protects the bulb of the e/M Apparatus during transport, Provides viewing of the e/M Apparatus in lit classrooms
Franck-Hertz Apparatus II, improved model of the well-known Franck-Hertz Apparatus (FHA001), featuring updated electronics with better stabilization and digital readouts for voltage and current (more robust, easier to read correctly)