blondica73 wrote:I have a TC4 board on order and will order a couple of 1.5mm omega probes. I used to have them on a different roaster, and they worked great. Not sure on the sampling rate on a TC4 board with K-type probes.

Go with Phidgets. Plug and play. Work great with Artisan. Hands down.

I've never used Phidgets; which one?

I'm debating which thermocouples to buy, the 2mm from Mill City ($25) or the 1/16" (1.58mm) from Omega ($92).

1) You need one hub. Can get wired or wireless depending on your preference. I have wired:
https://phidgets.com/?tier=3&catid=2&pcid=1&prodid=1202
https://phidgets.com/?tier=3&catid=2&pcid=1&prodid=1143

2) If you use TC's, get a 4-port module that plugs into the hub:
https://phidgets.com/?tier=3&catid=14&p ... rodid=1215

3) Instead of #2 you may also want to consider using RTD probes. I have them and I'm a huge fan of how they let you drive a roast in real time and require almost no smoothing of any kind:
3a) See here for why: https://artisan-roasterscope.blogspot.c ... noise.html
3b) If you do this you will need RTD probes and one RTD module for each probe: (instead of the module in #2)
https://phidgets.com/?tier=3&catid=14&p ... prodid=968
https://phidgets.com/?tier=3&catid=14&p ... rodid=1004

Regardless of RTD or TC decision, plug the hub into the sensor module(s) and connect to computer via USB/wireless. Download Phidget control panel software and install to make sure you can talk to the Phidgets. Go into Artisan and select device setup and pick the pre-defined Phidget configuration you've installed. All of this takes at most 1 hr. PM me if you have questions.

EDIT: Here is a link to complete kits for the above so you can see everything you'd need for a 2 probe setup of Phidgets:
https://shop.artisan.plus/shop/en/hardw ... -2xrtd-set
https://shop.artisan.plus/shop/en/hardw ... t-2xtc-set

blondica73 wrote: I'm debating which thermocouples to buy, the 2mm from Mill City ($25) or the 1/16" (1.58mm) from Omega ($92).

Read this and the blog at 3a) above regarding thermocouple size. Thinner isn't always better: https://dailycoffeenews.com/2019/07/09/ ... -readings/

Brewzologist wrote: Here is a link to complete kits for the above so you can see everything you'd need for a 2 probe setup of Phidgets:
https://shop.artisan.plus/shop/en/hardw ... -2xrtd-set

I ended up buying this kit. I appreciate your help and insight. I figured going with the wired version was better, less hassle. I will rerun the experiment once I get and play with the kit.

I think you will like it. My Artisan RTD setings: DeltaSpan=6, Smoothing=0, Sampling=1. All other smoothing settings and check boxes turned off.

I use DeltaSpan=10, Smoothing=0, Sampling=2 All other smoothing settings and check boxes turned off.

I know I put time and thought into making those choices but have since forgotten my logic and am always looking to learn from others. So I went back to one of my roasts from the other day and changed Delta Span to 6 just to see what it looked like and remembered that the line looked a bit more jumpy and that made me jumpy and quicker to make unnecessary gas adjustments. So I think I'm happy with my settings but point all of this out to either a) learn something from your explanation of why you use what you do (if you would be so kind to say). or b) point out that there are more than one way to skin a cat....who skins cats anyway??

Do you sample the TMP1200 RTD sync or async?

The Async box is ticked on mine...not that I know why or even what it means or even if you were asking me or Steve.

Probably because of this (taken from the artisan website discussion on noise on data input and the importance of good temperature probes). I'm assuming your trigger is 0C.