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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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 Helium Element Symbol discharge tube 80x80mm  Art. Nr. 004793  
Helium Element Symbol discharge tube 80x80mm
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Helium Element Symbol discharge tube 80x80mm

Perfect for element displays or demonstrations.

100% mercury free - only high purity 99.999% Helium was used.

  • a high voltage power supply 1500-8000V @ 35kHz - 25mA

The suitable power supply but can be found here.

Amount: 1x SET
Purity : 99.9993%
Packing: soft bag
80.00
- tax free

Availability: 4 in stock

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 Super bright Helium spectrum discharge tube 100mm - NEW  Art. Nr. 004929  
Super bright Helium spectrum discharge tube 100mm - NEW
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NEW!  Super bright Helium spectrum discharge tube 100mm - NEW

This new discharge tube is a redevelopment of our luminescent ampoules and offers the benefits of a metal-free ampoule with the luminosity of a commercial spectrum tube. In this tube, the excited gas  has to pass through many small capilaries and is forced to particularly strong shine. Good contact between the external electrodes around the ampoule is required.

Made of high quality shock- and heat proof boro silicate glass. 

 

ou can easily let it glow with a tesla generator.

Lengh: 10cm, dia. ~12mm

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

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

Amount: 1 x
Purity : 99.999%
Packing: bubble wrap
40.00
- tax free
5-9 pcs.: 38.00 Euro
>9 pcs.: 36.00 Euro
Availability: 88 in stock

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 Helium gas micro spectrum discharge tube 80-90mm - NEW  Art. Nr. 004343  
Helium gas micro spectrum discharge tube 80-90mm - NEW
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NEW! Helium Ar - Micro Spectrum discharge tube - metal free!

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

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

 

You can easily let it glow with a tesla generator.

Lengh: 3.3 - 3.5" = 8 - 9cm, dia. ~12mm

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

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

Amount: 1 Röhre/ tube
Purity : 99.9993%
Packing: tube
24.00
- tax free
5-9 pcs.: 23.00 Euro
>9 pcs.: 22.00 Euro
Availability: 93 in stock

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