Temperature gauge into the HX path of a Commercial Lever - Page 3

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naked-portafilter
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#21: Post by naked-portafilter »

FotonDrv wrote:I am sure i would be surprised about the pressure readings but what good would they be if i cannot change the pressure?

If I had the ability to vary the pressure thenthe pressure gauge would be a big help
You have every freedom with a spring lever. Playing with different pre-infusion and pressure profiles. The profile of the spring is only one option. If you have the gauge you will exactly know what's happening. Of course you don't need the gauge for that freedom. You can also do experiments without it.
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pizzaman383
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#22: Post by pizzaman383 »

I have found that I get a good temperature reading off the group head near the location you are talking about putting a probe in the water path.

Here is a post that illustrates my probe:
Temperature Management on Dipper Levers

I put temperature conducting grease between the thermocouple and the group head plus thick Teflon between the thermocouple and the clamp. There is a few second lag but it works well enough for my purposes.
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FotonDrv (original poster)
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#23: Post by FotonDrv (original poster) replying to pizzaman383 »

Yes, that measures the outside of the group temps, I am trying to measure the actual water running through the Group. Being that this is a cold fed HX there will be a noticeable temp drop when the shot is pulled because new cold water is entering. I have zero idea of how much water the HX holds but it looks like it could be more than just shot water.
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naked-portafilter
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#24: Post by naked-portafilter »

On the coming kit we have a service port which can be used for temp measurement, but that will make assembly a bit more difficult :-).
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FotonDrv (original poster)
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#25: Post by FotonDrv (original poster) »

That looks like it is going to measure the temperature of the rod and linkage.
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naked-portafilter
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#26: Post by naked-portafilter replying to FotonDrv »

That was just a wire. Sensors I use measure at the tip.
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FotonDrv (original poster)
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#27: Post by FotonDrv (original poster) replying to naked-portafilter »

That is a real engineering feat to get that wire around those corners.

When do you think you will have that product ready for sale?
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naked-portafilter
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#28: Post by naked-portafilter replying to FotonDrv »

I hope I can make working proto-type in the next two weeks.
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naked-portafilter
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#29: Post by naked-portafilter »

One step closer to the working proto-type for measuring temp. Deal with the turner: a customised fitting against a bag of a micro lot Kenya :-). A 250mm long 0.75mm K-Type Thermocouple should be delivered soon.







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naked-portafilter
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#30: Post by naked-portafilter »

It seems to be a pretty long thermocouple :-)

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