On 2007-04-25 17:01:42 +0100,
(D.M. Procida) said:

visionset wrote:

Are they worth having?

I'm speaking of ones like:
http://planet.farnell.com/email/cpc/WebOffers/ultclenr.htm

I've used them in the labs I used to work in, and those (300quid at the
time) work magnificently.

Perhaps the £17.99 one I mentioned won't be quite so magnificent.

Daniele

Not really Daniele

I have a larger tank type with heater and drop in baskets. For them
to be effective, the water generally needs to be quite warm to hot and
obviously the container large enough for requirements.