RTD - choices

Discuss roast levels and profiles for espresso, equipment for roasting coffee.
Beeroclock

#1: Post by Beeroclock »

I'm looking to try an RTD as my BT probe - I've ordered a Phidgets TMP1200 and am now looking at 3mm Pt100 RTD - there seems to be a fair few to choose from - including mineral insulated.

I'd really appreciate a point in the right direction - I'm based in the UK - these are the 3 I've narrowed it down to.

https://uk.farnell.com/labfacility/xf-3 ... dp/4100670


https://www.tcdirect.co.uk/Default.aspx ... _id=230/10


https://www.thermosense.co.uk/product/p ... _seal.html

Any suggestions gratefully accepted..

Thanks Philip

User avatar
CarefreeBuzzBuzz
Supporter

#2: Post by CarefreeBuzzBuzz »

Phillip,

Here was the list I am working off. You will likely go for 3mm not .125 or 3.2mm. You need to make sure you get the right length. One of the ones was listed at 1Meter if I am not mistaken. You don't want it reading outside the drum. Class A, 3 wire is sufficient. 4 is great if its there. Make sure your temp ratings are high enough. Hope this helps.

1. RTDS
a. .125 diameter probes
b. Length 50MM
c. Class A
d. 3 or 4 wires
e. Rated to 500 or more degrees
f. Transition protection - spring or other strong flexible protection for transition from probe to cables.
g. 3 foot cables
h. Cable insulation - whatever needed for temps, metal braid or fiberglass might be nice
i. Stripped leads
CarefreeBuzzBuzz
___
Artisan Quick Start Guide
http://bit.ly/ArtisanQuickStart

Beeroclock

#3: Post by Beeroclock »

Image
g]

Ended up with this in the end lets's see how it goes..

Thanks Philip

User avatar
CarefreeBuzzBuzz
Supporter

#4: Post by CarefreeBuzzBuzz »

Those look great. What length did you get? Do you need any protection in the transition from to the cable? My BT is my drop door so I do.

If you are getting this have you considered adding an 1136 to measure your fan?
CarefreeBuzzBuzz
___
Artisan Quick Start Guide
http://bit.ly/ArtisanQuickStart

Beeroclock

#5: Post by Beeroclock »

Image
Image


Hi

I've gone for 100mm - I've just drilled a hole through the bean door (20mm thick). The other probe through the sight glass bends down into the bean mass - It's a 2mm K-type (As is the current one through the bean door)

Not sure what you mean by the 1136 - will have to research.

Image

I've added a Magnehelic to measure airflow - I have a damper system)

Cheers Phil

User avatar
CarefreeBuzzBuzz
Supporter

#6: Post by CarefreeBuzzBuzz »

If you have the Vinthub the 1136 will allow you to record those air changes into Artisan.

https://www.phidgets.com/?tier=3&catid= ... prodid=109
CarefreeBuzzBuzz
___
Artisan Quick Start Guide
http://bit.ly/ArtisanQuickStart

User avatar
CarefreeBuzzBuzz
Supporter

#7: Post by CarefreeBuzzBuzz »

Error deleted
CarefreeBuzzBuzz
___
Artisan Quick Start Guide
http://bit.ly/ArtisanQuickStart

Beeroclock

#8: Post by Beeroclock »

Now that is very cool..

Beeroclock

#9: Post by Beeroclock »

Excuse my ignorance - but does this work like the Magnehelic - high and low input - connect to low input and leave high input open to a filtered socket?

User avatar
CarefreeBuzzBuzz
Supporter

#10: Post by CarefreeBuzzBuzz »

This is the best implementation article. I believe yes to your question. Haven't done mine yet.

https://wbcoffee.blogspot.com/2018/04/i ... ntial.html
CarefreeBuzzBuzz
___
Artisan Quick Start Guide
http://bit.ly/ArtisanQuickStart