Furnaces use an alumina tube to contain atmosphere and sample. Available gasses are: vacuum, air, N2, Ar, 6%H 94%N, 6%H 94%Ar, CO2.
LabTemp-Tube-Furnace-1700-C-1 (Bard Hall)
Lindberg-Tube-Furnace-1000-C-1 (Bard Hall)