Replacement mercury tube* for the Franck-Hertz experiment with mercury:
Franck-Hertz tube with Hg filling and heating furnace (115 V /50/60 Hz); article no. 1006794 or 1023094
and
Franck-Hertz tube with Hg filling and heating furnace (230 V /50/60 Hz); article no. 1006795 or 1023095
*(full compatibility to the above mentioned articles is granted)