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A 'gas-filled tube', also known as a 'discharge tube', is an arrangement of electrodes in a gas within an insulating, temperature-resistant envelope. Although the envelope was typically glass, power tubes often use ceramics, and military tubes often use glass-lined metal.
Gas-filled tubes operate by ionizing the gas with applied voltage to start electrical conduction. Both hot- and cold-cathode type devices are encountered. Depending on application, either the glow from the gas or the arc discharge may be the desired function.

Contents

Switching gas-filled tubes

Lighting and display gas-filled tubes

Other types of gas-filled tubes

See also

External links

Switching gas-filled tubes

Some important examples include the thyratron, krytron, and ignitron tubes.

Lighting and display gas-filled tubes

Specialized low-pressure gas-filled tube devices include the Nixie tube (used to display numerals) and the Decatron (used to count or divide pulses, with display as a secondary function).
Neon signage and neon lamps are other types of low-pressure gas-filled tubes.
Xenon flash lamps are gas-filled tubes used in cameras and strobe lights to produce bright flashes of light.

Other types of gas-filled tubes

A type of gas-filled tube called the Geiger-Müller tube is used to detect and measure ionizing radiation.
One of the proposed designs for a fusion reactor is basically a gas-filled tube, the Farnsworth-Hirsch Fusor.
A tube in which electrons move through a vacuum (or gaseous medium) within a gas-tight envelope is called an electron tube.

See also

★ Vacuum tube

★ Mercury-vapor rectifier

★ Voltage regulator tube

★ Electric glow discharge tube

External links

★ Pulse Power Switching Devices - An Overview (both vacuum and gas filled switching tubes)

★ Measurement of Radiation, Gas Filled Detector

★ Gas discharge tubes