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He
Helium
Atomic no.:
2
Atom. weight: 4.002602
Density: 0.17847
Class:
Gas
Melting point: -271.4°C
Boiling point: -268.935°C
Colour: colourless
   
Discoverer: Pierre Jules César Janssen
Place: Guntur, India
Year: 1868

A colourless, odourless gas that is totally unreactive. It is extracted from natural gas wells, some of which contain gas that is 7% helium. It is used in deep sea diving for balloons and, as liquid helium , for low temperature research. The Earth’s atmosphere contains 5 parts per million by volume, totalling 400 million tonnes, but it is not worth extracting it from this source at present.

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 Micro spectrum discharge tube set 80mm - He Ne Ar Kr Xe NEW!  Art. Nr. 004345  
Micro spectrum discharge tube set 80mm - He Ne Ar Kr Xe NEW!
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Complete Set of noble gases - Micro spectrum discharge tube set 80mm - He Ne Ar Kr Xe NEW! - metal free!

These new spectrum discharge tubes are an enhancement of our gas ampoules with all its benefits not having any metals parts but the luminosity of a standard spectrum tube. These tube can be used in continuous operation!

Made of high quality shock- and heat proof boro silicate glass. The fine capilary look fragile but is more endurable as any normal tube.

 

You can easily let them glow with a tesla generator.

Lengh: ~ 3.3 " = 80mm , dia. ~12mm

Operating voltage 1500-5000V @ 20mA - available here in our shop

This is a very special piece for a complete elements collection !!!

Amount: 5 Stk. / 5 pcs.
Purity : 99.99%
Packing: tube
100.00
- tax free
5-9 pcs.: 95.00 Euro
>9 pcs.: 90.00 Euro
Availability: 86 in stock

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