[time-nuts] New frequency standard, Mercury better than Cesium?

[Poul-Henning Kamp]

In message <20060717203222.78738.qmail at web50709.mail.yahoo.com>, Normand Martel
 writes:

>They should be able.... the standard uses a single
>mercury atom!! ;-)

Which interestingly enough might make them incompatible
with the RoHS (Reduction of Harmfull Substances) regulation
here in EU.

As far as I've understood RoHS, you can get away with trace amounts
of heavy metals on the banned list, under a theory of environmental
contamination, but if you include them deliberately, you're in
violation.

Fortunately metrological equipment is easy to get an excemption for :-)

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