High purity selenium discharge tube Ø12mm

 49,00 59,00 incl. VAT

High purity Selenium discharge tube.

sealed in boro silicate ampoule under vacuum.

Size:  length ~80 – 120mm, dia. 12mm – Lead and mercury free

SKU: 04147-4-3 Categories: ,


This ampoule was especially made for  experiments with high voltage.

This tube does not contain any other “starter” gases, just pure Selenium. It needs a certain temperature to “ingnite”. Put the ampoule under boiling water to increase the pressure inside (Selenium even needs a bit more heat than others). Once illuminated with suitable electrodes, the ampoule keeps the ideal temperature for continuous illumination. It will work with a tesla tube only  if heated enough before and during operation.

On the main picture you see the illuminated ampoule. Connected to a 5000V/35kHz transformer via two metal loops. The transformers can be found here.

The tube contains sublimed selenium which evaporates during operation and keeps the necessary pressure to illuminate.

Additional information

Dimensions N/A

80 x Ø12mm, 100 x Ø12mm, 120 x Ø12mm