greenyppols
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Temp controlled probe protector?
I was looking at one of these by VWR, it has a stainless steel probe that controlles the temp. Within reason, anyway.
Seeing as the probe would be effected by sulphuric acid, especially hot, I was wondering if encasing it in a thin tube of extruded teflon tube would
be helpful in protecting it. Kinda like a glass coated probe?
Im not sure how much the temp would be off , if any, because of this but it seems temp could be compensated for.
Say it was a piece of 1/16 hollow extruded teflon tube, reamed to tightly fit the probe, 1/4 o.d.
I can get the tubing, just thought what the illuminati think.
Any thoughts?
Thanks
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Dr.3vil
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That should work ok. The key here is not to have an air gap between the probe and outer case. The temperature should not be affected once the probe
and jacket equilibrate with the system temperature. I would also make sure that no steal is exposed as vapors may attack the metal. There is a pdf
floating around on emule that talks about material resistance to acids. Im sure this information is also available on the web. This will help you
determine if any material is compatible with an acid or base.
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greenyppols
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Posts: 97
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Location: Behind you, watching intently, sexually tense.
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My monkeying around with ptfe tubes, drilling them to fit and trying to fit the probe into them didnt work out.
Then I found that there are things called "F.E.P" sleeves. Good to 400ºf. They are pfte tubes that are melted over steel probes with a heat gun,
starting from the closed end. There is another type that is ok up to 500ºf, but I forgot what its called.
$2.50 each for 1/4"x12" tube that will shrink onto a 1/8" probe. A google search for probe protectors or sleeves outta turn it up. Steel and chlorine?
no prob. Various acids? no prob. hah! If ya cant melt it yourself, apparently they're willing to do it for you, for a price of course. Go buy/borrow a
heat gun.
Now anything corrosive can be monitored precisely..I think Im gonna love an auto-temp controlled doohickey. Much better n "turn it up, turn it down,
keep an eye on it for hours"...not leaving it alone, mind you, just not having to babysit it so dang much...I hope to be able to catch up on school
readings in the next room instead of eyeballing a thermometer.
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Tef Cap Ind
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FEP Probe Covers
The part that you are looking for is a Heat Shrinkable FEP Probe Cover. Manufactured by Tef Cap Industries.
Probe Covers are designed to fit over the probes or thermocouples and when heated will shrink tight onto the part. The FEP Covers are good to 400°F
and PFA will be good for temperatures up to 500°F.
Probe Covers allow for complete protection in almost any chemical environment.
for more info on Heat Shrink FEP and PFA Probe Cover visit https://tefcap.com/fep-probe-covers
Or Call : 610-692-2576
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Herr Haber
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Very nice Tef Cap Ind !
Just bookmarked your website, you've got very interesting products.
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