For anyone still interested in the topic, I borrowed a handheld Thermo Fisher XRF analyser from a colleague of mine. I screened several Z573, IN-14 and IN-18 tubes. I also had faulty tubes which I took apart to screen the internals. I expected the nixies to be made soft glass - soda lime. Surprisingly all of the tubes I had are made of leaded glass. The instrument detected 20-25% of Pb in the glass alone. The red coating on the Z573 tubes contains cadmium slightly above the threshold. The rest of the substances were within norm.
сряда, 8 август 2018 г., 12:34:49 UTC+1, Jovani Pines написа: > > Hello, > Has anyone tried to obtain RoHS certification for old nixie tubes or for > modern homemade models? > > The point of interest to me is the mercury content. RoHS allows Hg only up > to 0.1% parts by weight of homogeneous material of the assembly. The exact > definition is as follows: > > *"The term "homogeneous" means "of uniform composition throughout". > Examples of "homogeneous materials" are individual types of: plastics, > ceramics, glass, metals, alloys, paper, board, resins and coatings. The > term “mechanically disjointed” means that the materials can, in principle, > be separated by mechanical actions such as: unscrewing, cutting, crushing, > grinding and abrasive processes."* > > Therefore, the getter pill/strip on its own is a homogeneous material that > can in theory be disjointed by mechanical action... > > On the other hand, in document 2002L0095 — EN — 25.09.2010 — 008.001 — 1 > <https://eur-lex.europa.eu/legal-content/EN/TXT/PDF/?uri=CELEX%3A02002L0095-20100925&from=EN> > Page 9 - M13 4(a), states that up to 15mg of Hg is allowed - *"Mercury in > other low pressure discharge lamps (per lamp)"*. > > This does not completely exempt nixie tubes from the mercury content but > at least it is provides some limit which can be used for comparison to the > XRF analysis from an RoHS certification lab. > > I will be eager to see if anyone else has thought about this :) > -- You received this message because you are subscribed to the Google Groups "neonixie-l" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To post to this group, send an email to [email protected]. To view this discussion on the web, visit https://groups.google.com/d/msgid/neonixie-l/d233a6a3-7ffe-4ec6-9ee6-6df8f6f774b5%40googlegroups.com. For more options, visit https://groups.google.com/d/optout.
