High purity argon gas ampoule, purity 99.999%
sealed in boro silicate ampoule under vacuum.
Size: length 45-50mm, dia. ~11mm
This ampoule was especially made for experiments with high voltage. Simple ampoules of Argon do not illuminate.
On the picture you see the illuminated ampoule. Connected to a 5000V/35kHz transformer via two metal loops. The transformers can be obtained on request.
