New Giveaway - Wort Monster Conical Fermenter!

Home Brew Forums > Home Brewing Beer > DIY Projects > Probe to fit Thermometer Site guage




Reply
 
LinkBack Thread Tools Display Modes
Old 11-04-2009, 06:48 PM   #1
mcgeebc
Feedback Score: 0 reviews
Recipes 
 
Join Date: Jan 2007
Location: Cleveland, OH
Posts: 90
Liked 2 Times on 2 Posts

Default Probe to fit Thermometer Site guage

I think I understand the difference between a thermocouple and a probe, but I want to be sure I am picking the right thing.

I am building an electric HLT that will be controlled with a PID.

I am buying the Weldless Thermometer Sight gauge from Bargain Fittings seen here:
http://www.greatbargain.net/order/shop1.html

I think I need a probe with a 1/2" NPT back thread. I need to find something like this, but with 1/2" instead of 1/4" (and hopefully a little cheaper)
http://www.auberins.com/index.php?main_page=product_info&cPath=3&products_ id=109

From what I understand, a thermocouple will not work because it will stop the liquid from filling in the site guage.

I'm sure other people have bought the same sight gauge from bargain fittings, what are other people using?



__________________
mcgeebc is offline
 
Reply With Quote Quick reply to this message
Old 11-04-2009, 08:20 PM   #2
Bobby_M
Vendor and Brewer
HBT_SPONSOR.png
Vendor Ads 
Feedback Score: 1 reviews
 
Bobby_M's Avatar
Recipes 
 
Join Date: Aug 2006
Location: Piscataway, NJ
Posts: 21,734
Liked 853 Times on 572 Posts
Likes Given: 26

Default

The probe you linked to will work with a 1/2" to 1/4" NPT bushing.



__________________
BrewHardware.com
Sightglass, Refractometer, Ball Valve, Weldless bulkhead, Thermometer, Decals, Stainless Steel Fittings, Compression Fittings, Camlock Quick Disconnects, Scale, RIMS tube, Plate Chiller, Chugger Pump, Super Clear Silicone Tubing, and more!
Bobby_M is online now
 
Reply With Quote Quick reply to this message
Old 11-04-2009, 08:22 PM   #3
Plan9
Feedback Score: 0 reviews
Recipes 
 
Join Date: Jan 2008
Location: Apopka, FL
Posts: 269
Liked 1 Times on 1 Posts

Default

Here is the bushing...

http://www.mcmaster.com/#4464k265/=4czxmw

__________________
"So don't put a pissed off cat in your bottling bucket. Problem solved." - cheezydemon


Central Florida Home Brewers


http://twitter.com/PlanNine
Plan9 is offline
 
Reply With Quote Quick reply to this message
Old 11-04-2009, 09:36 PM   #4
passedpawn
Moderator
HBT_MODERATOR.png
Feedback Score: 0 reviews
 
passedpawn's Avatar
Recipes 
 
Join Date: Apr 2009
Location: ☼ Clearwater, FL ☼
Posts: 17,494
Liked 2651 Times on 1708 Posts
Likes Given: 2153

Default

Brass version of this bushing is available at Lowes for couple of bucks. I bought them there. I do like the SS one much better tho!

BTW (and I am sure this has been discussed here before, but...) you really should get the RTD probe instead of the thermocouple. Accuracy of the thermocouple depends on the PID staying at the same temperature. If you put the PID in a box that might get warm (i.e., if there are SSR's in there), the PID could potentially have an error of 2 or 3 degrees F (according to Auber... I find this hard to believe, but this is from them). The RTD is immune to this problem, but does cost a few dollars more.

In case you wonder, there is a reference voltage generated in the PID referred to as the cold junction. It is the source of the thermocouple error. You can see this diode almost sticking out of the vent holes in the back of the PID.

__________________
It is finished, It is finished - IT IS THE MERCY
passedpawn is offline
 
Reply With Quote Quick reply to this message
Old 11-06-2009, 04:48 PM   #5
mcgeebc
Feedback Score: 0 reviews
Recipes 
 
Join Date: Jan 2007
Location: Cleveland, OH
Posts: 90
Liked 2 Times on 2 Posts

Default

Thanks. I guess I'll get the RTD and stainless bushing. Might as well do it the right way and not the cheap way.

Just wish it was cheaper.



__________________
mcgeebc is offline
 
Reply With Quote Quick reply to this message
Reply


Quick Reply
Message:
Options
Thread Tools
Display Modes


Similar Threads
Thread Thread Starter Forum Replies Last Post
Thanks for nothing, probe thermometer! uncleozzy Equipment/Sanitation 13 11-26-2008 03:28 PM
MLT thermometer probe guard Bobby_M DIY Projects 10 06-30-2008 06:57 PM
Thermometer probe height jagg All Grain & Partial Mash Brewing 2 03-28-2008 01:13 AM
Digital probe thermometer rohanski Equipment/Sanitation 5 10-26-2007 10:27 PM
Probe Thermometer mblakely Equipment/Sanitation 3 05-29-2007 01:10 PM