Mechanical gauge on plate chiller outlet is too slow.

Postby LeeH » Sat Dec 23, 2017 18:59

I calibrated all my tank gauges and controller last today with my thermo pen but I’m not happy with how slow the dial gauge reacts.

It is in a thermowell so the way I see it is to get one that fits straight in or use a spare PT100 and Chinese Rex PID controller to indicated the temp.

I'm filling the conical up from the bottom valve while the lid is on with the idea of not poking my arm into the FV.

Any thoughts?

Lash up the controller in a box and loose the elbow, probe in the top of the T with the valve outlet in the side of the T?

1/2 inch short dial gauge?

Thermal paste?






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Last edited by LeeH on Sun Dec 24, 2017 10:11, edited 2 times in total.
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Re: Mechanical gauge on plate chiller outlet is too slow.

Postby INDIAPALEALE » Sun Dec 24, 2017 09:38

Why not just use your thermopen to test the temp where the wort enters the FV and adjust the flow accordingly.?

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Re: Mechanical gauge on plate chiller outlet is too slow.

Postby LeeH » Sun Dec 24, 2017 10:12

Because I'm filling the conical up from bottom valve so no access to the flow.

I'm just trying to keep the lid on the conical.




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Re: Mechanical gauge on plate chiller outlet is too slow.

Postby INDIAPALEALE » Sun Dec 24, 2017 15:34

LeeH wrote:Because I'm filling the conical up from bottom valve so no access to the flow.

I'm just trying to keep the lid on the conical.




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A Blichmann "Thrumometer" might be the answer.

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Re: Mechanical gauge on plate chiller outlet is too slow.

Postby jaroporter » Sun Dec 24, 2017 22:35

thermal paste may help a little i'd guess but if it's a stainless thermowell then it's not the best conductor. given it's a fermenter making a copper one isn't ideal i'm led to believe.

considered it myself and decided to use brewbuilder stainless probes and a cheap pid as the display (i looked for ages for just display screens but they were more exclusive). easily removable for cleaning i desired too..
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Re: Mechanical gauge on plate chiller outlet is too slow.

Postby LeeH » Sun Dec 24, 2017 23:47

Thanks all. I think I’ll just knock up a controller in a box. I have all the parts kicking around.

Thanks and happy Xmas


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Re: Mechanical gauge on plate chiller outlet is too slow.

Postby ockelford » Thu Jan 04, 2018 15:36

Hi Lee,

I have found the same - with my boiler pt100, which is in a thermowell, with thermal grease, I've found that the reading is as much as 7 degrees C behind, while I'm chilling with my copper coil chiller. I have subsequently reasoned that the best methos is to forget thermowells (maybe OK for fermenters) and fix the pt100 (with screw thread) direct into the line of wort.

If you have a 1/2" NPT/BSP threaded pt100, then a female threaded tee is best (you probably already know all this, it works brililantly on my HERMS, and I get very rapid feeback.

R
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Re: Mechanical gauge on plate chiller outlet is too slow.

Postby LeeH » Fri Jan 05, 2018 14:32

Yep that’s what I’m going to do, probe direct into the wort and a controller in a small enclosure.

Cheers.


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