The experiment can be done under normal temperature, demanding no heating or temperature keeping. 
This instrument is used for proving Bohr's theory of atomic energy level. 
The spectrum amplitude curve can be plotted by means of point-measuring, it can also be observed directly on the screen of oscilloscope.

It takes a tube filled with argon as a F-H tube. 


Micro-current measuring range: 10-9~10-6A.
Numbers of spectrum amplitude on oscilloscope: ≥3.
F-H tube: fill with argon gas.
Numbers of spectrum amplitude by point-measuring: ≥5.
Preheating time: ≤5min.

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Frank-Hertz Experimental Instrument

SKU: SL-265