[Sca-cooks] Sous Vide
Stefan li Rous
StefanliRous at austin.rr.com
Sun May 20 22:47:56 PDT 2012
<<< On 5/13/2012 2:33 PM, Terry Decker wrote:
> It would seem to me that you could use a crock pot (or for really
> large quantities, a turkey roaster) and a decent digital probe
> thermometer to the same effect.
>> There is a make your own sous vide article in one of last years MAKE
>> I have not yet done it but apparently it works well, you can do large
>> quantities and it cost $70.
Actually, crock pots are notorious for *not* holding a constant
temperature. If you want to stay around the kitchen for constant
tweaking, knock yourself out =) Make one with the material list or get a
premade one, trust me =)
The reason that a crock pot is notorious for not holding a constant
temperature is probably that they are cheap and for their use they
don't have to maintain a constant temperature. A the temperature they
do maintain is probably due to the ceramic crock itself.
Digital controllers have come way down in price. I'm eyeing some solid
state digital temperature controllers available on ebay, a
thermocouple and a SSR (solid state relay, which allows turning the
crockpot off and on) to make one of these sous vide machines. The cost
for those elements is about $30 or so plus a box to put them in.
I think a tighter, more responsive control loop should solve the
disadvantages seen in the unmodified crockpot. I also don't see that a
temperature that varies by a couple of degrees would cause problems,
but I'd welcome any opposing evidence.
And lastly, how is Sous Vide cooking safe? I thought that low
temperatures for several days was a recipe for food posioning
problems. I thought the 130 degrees F temperatures I'd been seeing in
this was the dangerous temperature range. Perhaps the fact that the
food is sealed in the plastic bags solves this, but I thought that
would just provide an incubator for any thing which was already in the
THLord Stefan li Rous Barony of Bryn Gwlad Kingdom of Ansteorra
Mark S. Harris Austin, Texas StefanliRous at austin.rr.com
**** See Stefan's Florilegium files at: http://www.florilegium.org ****
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