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rws
06-03-2013, 06:18 PM
How could we hold a pot of "stuff" at 90 degrees, or maybe 110 degrees? Making cheese the books call for holding the milk/ stuff at the low temp for several hours. Can,t do it on the stove, so what could be used or made?

gvasale
06-03-2013, 06:26 PM
Some modern ovens will hold 100* I've used mine to make yogurt. Others may also have a warming bin underneath the oven. Not sure of the temperature range there as I've never used it.

macona
06-03-2013, 06:36 PM
Try one of the sous vide setups. They are for low temp cooking and might go down that low.

Black_Moons
06-03-2013, 07:09 PM
Double boiler I thought was the standard way to cook at very low temps

Duffy
06-03-2013, 08:50 PM
Aquarium heater?

elf
06-03-2013, 09:52 PM
Try one of the sous vide setups. They are for low temp cooking and might go down that low.

+1

Do a search for "Arduino Sous Vide'

You can also do it with just a PID and few other electronic pieces:
http://dx.com/p/c100-ssr-digital-temperature-controller-thermocouple-black-137496
http://www.auberins.com/index.php?main_page=product_info&cPath=1&products_id=3

Billy Hill
06-03-2013, 10:02 PM
This one says it goes down to 86 so it's close to your limits. THERMOSTAT ADJUSTABLE 86-194F W/REMOTE PROBE - SWITCHES FLOW / PRESSURE / HIGH LIMIT / THERMOSTATS (http://www.pressuretek.com/thad86.html)

TGTool
06-03-2013, 10:38 PM
+1

Do a search for "Arduino Sous Vide'

You can also do it with just a PID and few other electronic pieces:
http://dx.com/p/c100-ssr-digital-temperature-controller-thermocouple-black-137496
http://www.auberins.com/index.php?main_page=product_info&cPath=1&products_id=3

Yup. My son did this with a coffee urn from the used stuff place, the Arduino in a metal junction box along with the duplex receptacle and a thermouple doped up with JB Weld hanging inside the urn of water. Once when I was there we rejiggered the heaters in the bottom to bypass the cutout and get the temperature up just a little, but the regular coffee machine should be well within your range. And yes, he's made cheese in it too.

Paul Alciatore
06-03-2013, 10:39 PM
Double boiler is not a good idea as it is designed to work at boiling temperature of water: 212 deg. F. It would probably do a very good job of holding that temperature. You would have to manually try to hold the 100 degrees. OR, DID YOU MEAN 90 -110 DEGREES CENTIGRADE? If so, then a double boiler would be ideal because that is what it does.

Small, well insulated closet or room with small (electric) heater and standard thermostat. Some radiator style heaters may have a thermostat that goes that high. Thermostats for 115 VAC can be purchased from places like Grainger. Suggest you do this in a separate, "out" building.

Some electric skillets may go that low. Check it with a thermometer. Or better yet, a crock pot.

Small insulated box with electric light bulb (the old fashioned, energy wasteful kind) and a thermostat. Again, thermostats for 115 VAC can be purchased from places like Grainger. The old incascadent bulbs generate more heat than light so they are actually more energy efficient as heaters than as light bulbs. If the light is not allowed to escape the box, they are almost 100% efficient at producing heat.

wierdscience
06-03-2013, 11:06 PM
Electric crock pot,thermocouple and a temperature controller.If a crock pot isn't big enough,then use a stock pot and an electric blanket.If your not opposed to spending a few bucks McMaster has heater bands and pads for metal vessels that will do what you need.

http://www.automationdirect.com/adc/Shopping/Catalog/Process_Control_-a-_Measurement/Temperature_-z-_Process_Controllers/1-z-16_DIN_Size_(SL4848_Series)/SL4848-RR

http://www.automationdirect.com/adc/Shopping/Catalog/Sensors_-z-_Encoders/Temperature_Sensors_-a-_Transmitters/Thermocouple_Sensors/Probes_(with_Lead_Wire_Transition)/THMJ-T06L06-01

darryl
06-03-2013, 11:40 PM
'can't do it on the stove'- probably can. Take the pot you'll be using and fill it about 3/4 full with water. Find a rack which you can bend two edges down on, and use that as a spacer above one of the stove elements. Set the pot on it, set the element on low, leave it for an hour or more. Check the temperature now and then until it stabilizes. If it's too hot, the rack is not high enough- too low and the rack is too high, or you can stand to dial it up a bit. I would suggest to start with a spacing that puts the bottom of the pot about an inch above the element. If there will be a lid on the pot when you're cooking the cheese, then put the lid on for the test.

When you find the right height for the pot, dump the water and make your cheese.

J Tiers
06-04-2013, 12:13 AM
Double boiler on stove is a standard way to hold a temp at or below boiling, without any chance of burning stuff on a hot spot. Works great.

I even have one old pot and a can I use for re-waxing bicycle chains. I use "paraffin wax" instead of oil as it stays cleaner. Double boiler principle (pot and can) is perfect to melt wax into rolled-up chain but not have any chance of burning it.

So a crockpot is also a good plan, and a crockpot as a double boiler is possibly even better as to very stable warming/heating and no hot spots.

I seem to remember making yogurt that way decades ago when on a health food kick.