J2451

Geissler Discharge tubes 

Description:

This set of 6 premium Geissler tubes is designed to demonstrate the differing discharge characteristics of a gas discharge tube under varying degrees of vacuum. These large Geissler tubes measure approximately 16″ / 40cm in length and 1″ / 2.5cm in diameter,having six tubes with pressures of 40mm., 10mm., 6mm., 2mm., 0.1mm. and 0.001 mm. of mercury, marked on respective tubes The cathode is disc shaped and the anode is pointed. On passing current, each tube shows a different nature of discharge and also different glow at cathode. All tubes are clearly identified with degree of vacuum in mm Hg and include the following: 
40mm Hg Violet streamers appear between electrodes 
10mm Hg A pink glow fills the tube, concentrated around the anode 
3mm Hg Discharge becomes faint blue, Faraday’s dark space appears 
1mm Hg Faraday’s dark space expands 
0.10mm Hg Cathode begins to fluoresce 
0.02mm Hg Cathode rays emerge, causing the tube sides to fluoresce 

Both electrodes on these premium tubes have a full glass envelope. A plastic stand, insulated electrode and connecting wire with clip are included (as shown in product photo). A 50mm induction coil is the recommended power supply.

Pack/ set 6 with stand size:35*15*48  Weight: 1.2KGS