File:Mercury discharge tube.jpgDescriptionMercury discharge tube.jpg English: Spectrum = gas discharge tube filled with mercury Hg. Used with 1,8kV, 18mA, 35kHz. ≈8" length. Deutsch:
File:Hydrogen discharge tube.jpgDescriptionHydrogen discharge tube.jpg English: Spectrum = gas discharge tube filled with hydrogen H2. Used with 1,8kV, 18mA, 35kHz. ≈8" length. Deutsch:
File:Nitrogen discharge tube.jpgDescriptionNitrogen discharge tube.jpg English: Spectrum = gas discharge tube filled with nitrogen N2. Used with 1,8kV, 18mA, 35kHz. ≈8" length. Deutsch:
File:Oxygen discharge tube.jpgDescriptionOxygen discharge tube.jpg English: Spectrum = gas discharge tube filled with oxygen O2. Used with 1,8kV, 18mA, 35kHz. ≈8" length. Deutsch: