Vákuumcső (Pohl típusú)

For demonstrating how pressure affects the glow in a gas discharge tube;
thick glass tube with central suction pipe with GJ 19/26;
disc electrodes mounted on metal caps are placed at both ends to supply high voltage;
coupling piece of metal with flange DN 16 and ventilation valve;
dimensions: L = approx. 650 mm, D = 36 mm