HomeRoast Digest


Topic: Read CG OkcEspresso post on BBQ Drum Thermocouple design (5 msgs / 221 lines)
1) From: CoffeeRoastersClub
I thought I would pass along a great tip on putting a temp read probe 
into a BBQ drum that Chris (OkcEspresso) on CG happened to come 
upon.  I think it is a great idea worth sharing, so I am posting the 
following topic I posted on CG to this list.  Anyone with a BBQ 
roaster drum setup can benefit from this.
as follows:
I just got done reading Chris's post on http://www.coffeegeek.com/forums/coffee/homeroast/336815#336815about his method of adapting a thermocouple to a BBQ drum.  After 
thinking about it I believe it is one of the best ways to measure 
bean mass temp inside the drum.  His method eliminates the "twisting 
thermowire" issue in a real easy way.  The only thing I would change 
would be to drill a small hole in the end cap in the drum being used 
facing the side of the grill opposite the side with the rotisserie 
motor, and insert the probe in that hole instead of one of the drums 
perforations.
I would just also mention that if one were to use the method to make 
sure their digital thermometer has the non-plastic covered 
thermocouple wires (just metal sheathed wire).
It is a must read for people wanting to put a temp sensor in the 
BBQ.  Great idea Chris.
Len
Peanut Roasting Supplies
Drums, Kits, and Complete Roastershttp://www.PeanutRoasting.comhttp://stores.ebay.com/PeanutRoasting
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2) From: Homeroaster
My open ended drum allows me to insert a 12" thermometer probe right into
the bean mass and I get a very reliable temperature reading of what the
beans are doing.  I can predict first and second crack within almost seconds
just by watching the dial.  Whether it reads anything remotely resembling
bean temperature is really up for grabs, but as a reliable predictor of
temperature increase, and as a marker for the cracks, it works fine.
*********************
Ed Needham
"to absurdity and beyond!"http://www.homeroaster.com*********************

3) From: Mejia, Carlos
Ed wrote:
My open ended drum allows me to insert a 12" thermometer probe right
into
the bean mass and I get a very reliable temperature reading of what the
beans are doing.  I can predict first and second crack within almost
seconds
just by watching the dial.  Whether it reads anything remotely
resembling
bean temperature is really up for grabs, but as a reliable predictor of
temperature increase, and as a marker for the cracks, it works fine.
*********************
Ed Needham
"to absurdity and beyond!"http://www.homeroaster.com*********************
Ed... do you have any pictures of your drum/thermometer that you can
post or point us to?   ~carlos

4) From: Homeroaster
http://www.homeroaster.com/5pound2.htmlPicture 6 (counting down) show the thermometer sticking through the side of 
the grill body and into the drum.
Picture 7 shows the drum with a canning funnel in the open end of the drum.
Here's a better pic of the open end of the drum...http://www.homeroaster.com/F1180150.jpgI really need to update these pics again because things are a bit different. 
I now have a different motor and bronze bushings on the shaft.  Along with a 
few other minor changes.
*********************
Ed Needham
"to absurdity and beyond!"http://www.homeroaster.com*********************

5) From: Tim Harvey
Ed,
How much smoke do you get on a 5lb roast with your new ventilation?
Do you have a small fan to pull the smoke, or does the rising heat do it all?
Are you able to keep the shop mostly closed up in the winter so you don't freeze?
Thanks,
TIM
---- Homeroaster  wrote: 
=============http://www.homeroaster.com/5pound2.htmlPicture 6 (counting down) show the thermometer sticking through the side of 
the grill body and into the drum.
Picture 7 shows the drum with a canning funnel in the open end of the drum.
Here's a better pic of the open end of the drum...http://www.homeroaster.com/F1180150.jpgI really need to update these pics again because things are a bit different. 
I now have a different motor and bronze bushings on the shaft.  Along with a 
few other minor changes.
*********************
Ed Needham
"to absurdity and beyond!"http://www.homeroaster.com*********************


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