Neon gas is mainly used in special instruments, electric light sources, low temperature research and preparation of deep sea diving breathing gas due to its low production and relatively high cost.

1 . Gas for electric light source and detection

     Helium gases are used in almost all modern light sources, and neon is mainly used to fill various fluorescent lamps, light signaling devices, and glow lamps. For low-pressure discharge tube, in the clean glass tube, pure neon produces orange light. Neon, argon and helium are mixed in different proportions and filled into various filter glass tubes, which can be made into colorful neon lights (type display lights). Neon low pressure discharge tubes are widely used as indicator lights. As a result of neon light red light transmission capacity is strong, for a long time with neon are not used to fill a variety of signal devices, as ports, airports, stations and other land and water traffic signs.

      Neon is used in a radioactive ionization detector and a mixture of neon, argon, and helium is used in a Geiger-Muller counter. In addition, they can be filled with neon in certain high pressure tube transfer switches and adjustment tubes. In the tracer particle detector, neon is the commonly used filling gas in spark chamber and electron flow chamber. Liquid neon is also widely used in cryogenic radiation detectors and other specialized instruments in the space exploration programme. Neon mixed with argon, helium and mercury vapor can be used to fill phosphor tubes. A mixture of neon and argon may be used to fill a thyratron radio tube. Helium gas is widely used in laser technology and neon-helium continuous laser is widely used in optical applications with power of only a few tenths of a watt.

2 . Low-temperature engineering application of neon

      As is known to all, the liquid temperature range of helium is 2×10-3 -- 5.20K, the liquid temperature range of hydrogen is 14.2 -- 33.0K, and the liquid temperature range of neon is 24.5-44.40 K. Because neon is chemically inert and has a high latent heat of evaporation (by the same volume of liquid, liquid neon can refrigerate 2.7 times of liquid hydrogen), neon is often used instead of hydrogen as a safe coolant in experiments within 25-40K. When neon is used as a refrigerant, the effective cooling capacity of neon can be increased by 20% by using the latent heat of fusion of solid neon. In order to quickly pump a large space into a vacuum state, liquid helium cryogenic pump is often used, if the vacuum requirement is not high, liquid neon cryogenic pump can also be used. A closed circulation mini refrigerator made of neon as a medium can be used in the infrared detector of missiles. Liquid neon is often used in the bubble chamber for high energy particle detection and research. In the United States, neon is mainly used in bubble chambers and is in great demand at one time. In addition, liquid neon has been used in the study of free radicals. With the development of science and technology, liquid neon as a 25-40K cryogenic coolant will be paid more and more attention.

      In addition, since thermal noise in many electronic devices is reduced 

at low temperatures, many radio, infrared, and other radiation detection 

instruments can be cooled with neon recirculation to increase sensitivity.