A few years ago
we at Adams & Chittenden Scientific Glass decided to re-engineer the
whole cordset and connector, basing the connection on the GL45 thread,
which is a standard, rather beefy thread, in common use in the chemistry
and biology worlds. We designed a stopper unit using machined polypropylene
and silicone, with stainless steel posts to connect to the heating coil.
This has proved very effective, avoiding many of the leakage, corrosion,
and disconnection problems common in the older version. Older stills
having the obsolete thread and cordset can be retrofitted for the new
version.
We have also addressed
a problem of insufficient condensing capacity in previous Graham
condensers. The Adams & Chittenden condenser is a full 300 mm long,
with a tightly wound coil, to ensure complete condensation.
See also notes about volative acid testing, and history
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