That seems overpriced. Can one not use units such as this one?
New Digital Ultrasonic Jewelry Watch Denture Cleaner 18
$25.99
http://cgi.ebay.com/New-Digital-Ultrasonic-Jewelry-Watch-Denture-Cleaner-18_W0QQitemZ300290481856QQcmdZViewItemQQptZLH_DefaultDomain_0?hash=item45eab51ec0&_trksid=p3286.c0.m14
Marshall
Brooks Bradley wrote:
Although I made only a passing comment in one of my earlier posts, it
is of some moment that I elaborate on possible temperature effects
upon Ultrasonic system operation.
First, do remember that the VOLUME of liquid in the cleaner tank is of
consequence. The temperature of the liquid component will, in most
cases, rise somewhat with the passage of time (especially in cases of
uninterrupted operation). This should not be of great concern to the
experimenter....IF there is always sufficient volume of liquid in the
tank. MOST ultrasonic cleaners (even the cheaper ones) have fill marks
on the sides...one for Minimum and one for Maximum. For obtaining the
most acceptable results in MOST operations such as the one I outlined
for the Encapsulation experiment....it is advisable to fill the tank
to at least the 2/3 level...but ABSOLUTELY
WELL ABOVE MINIMUM. There is little danger of overheating the vitamin
C to a point of compromise.....but THERE IS some danger of damaging
Barium Titanate or Electromagnetic
type transducers (especially the cheaper ones)...and the Harbor
Freight unit IS one of the cheaper ones. Actually, the general
likelihood of damaging, even the Barium Titanate transducers would
only occur in cases where the experimenter "heated the liquid" before
starting the US unit.
Because of the additional, useful, features on the larger (2.5 liter)
ultrasonic
cleaner available at Harbor Freight (Item #95563)....it should be a
better buy ($60.00)for persons desiring to make larger quantities of
encapsulation candidates. However, the smaller unit should be quite
adequate for the individual experimenter.
Sincerely, Brooks Bradley.
---------[ Received Mail Content ]----------
*Subject : *Re: for Jim Holmes CS>heat and vitamin c
*Date : *Tue, 25 Aug 2009 12:46:36 -0400
*From : *[email protected]
*To : *[email protected]
Main concern would be overheating the transducer and destroying it.
Time your work with a kitchen timer thingy that will chime.
Chuck
My arm! said Captain Hook offhandedly.
On 8/25/2009 9:42:40 AM, arthur rambo ([email protected]) wrote:
> My Ultrasonic cleaning unit sometimes runs on without stopping,
and the
> liquid heats up a bit. I am wondering if it might cause the
ascorbic acid
> to degenerate. Any opinions?
>
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