Detachable pt100 temperature probe

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Gordito
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Posts: 3
Joined: Sun Jun 15, 2014 11:26 am

Detachable pt100 temperature probe

Post by Gordito » Sun Nov 29, 2015 4:03 pm

Just received this detachable temperature probe from eBay, shipped from China. It was less than a £10 delivered. I've tested it with my pid and it seems to work perfectly. It will be handy when cleaning out pots etc :)
Thought I'd share it for anyone interested. ImageImageImage

Listing number on eBay 381466785508

Lockwood16

Re: Detachable pt100 temperature probe

Post by Lockwood16 » Wed Dec 16, 2015 1:44 pm

Good find!
I have ordered one to replace my fixed PT100 probe in my boiler.

Best regards,
Lockwood16

Haydnexport
Lost in an Alcoholic Haze
Posts: 593
Joined: Tue Jan 06, 2015 2:12 pm

Re: Detachable pt100 temperature probe

Post by Haydnexport » Wed Dec 16, 2015 7:10 pm

Ive been looking for these for ages , saw them on a post and then couldnt find it . Thanks :=P

Edit: Bum, these are pt100 , no sign of ntc ones :(

Fil
Telling imaginary friend stories
Posts: 5216
Joined: Sun Oct 16, 2011 1:49 pm
Location: Cowley, Oxford

Re: Detachable pt100 temperature probe

Post by Fil » Wed Dec 16, 2015 8:01 pm

did i miss the all important link??

after snagging the probe leads a few times during clean up and put away, so was planning to switch to thermowells ..
ist update for months n months..
Fermnting: not a lot..
Conditioning: nowt
Maturing: Challenger smash, and a kit lager
Drinking: dry one minikeg left in the store
Coming Soon Lots planned for the near future nowt for the immediate :(

Haydnexport
Lost in an Alcoholic Haze
Posts: 593
Joined: Tue Jan 06, 2015 2:12 pm

Re: Detachable pt100 temperature probe

Post by Haydnexport » Fri Dec 18, 2015 12:32 pm

ebay item number at the bottom of the op

Fil
Telling imaginary friend stories
Posts: 5216
Joined: Sun Oct 16, 2011 1:49 pm
Location: Cowley, Oxford

Re: Detachable pt100 temperature probe

Post by Fil » Fri Dec 18, 2015 7:01 pm

Haydnexport wrote:ebay item number at the bottom of the op
thanks i had missed that =D>
ist update for months n months..
Fermnting: not a lot..
Conditioning: nowt
Maturing: Challenger smash, and a kit lager
Drinking: dry one minikeg left in the store
Coming Soon Lots planned for the near future nowt for the immediate :(

aamcle
Lost in an Alcoholic Haze
Posts: 714
Joined: Tue Jan 15, 2013 11:42 am
Location: Newton-le-Willows ( St Helens/Warrington)

Re: Detachable pt100 temperature probe

Post by aamcle » Fri Dec 18, 2015 10:48 pm

I've given up with "connectors" I've tried a few types and they worked at first but a few batches later and they failed.

Ugly but functional I currently using plain screw blocks

http://s7g3.scene7.com/is/image/ae235?w ... 35/25545_P

They always give repeatable connection!


Atb. Aamcle

YeastFace Brew Co.

Re: Detachable pt100 temperature probe

Post by YeastFace Brew Co. » Wed May 03, 2017 7:58 am

Gordito, wondering how you're getting on with this probe? I've purchased a similar one which should hopefully arrive by Saturday (UK-based seller, but same item). Is the seal ok? (assuming you've used a BSP nut as I intend on). Thanks.

brewzone

Re: Detachable pt100 temperature probe

Post by brewzone » Thu May 04, 2017 8:10 pm

I bought a few of these.

The 1/2" thread is watertight with a few turns of PTFE.

I did find variations in the ohm value at 0 degrees.

One reads 96.7 ohms and the other reads 98.

Been testing them out on an Arduino Uno and an LM358 circuit with 31.57 gain.

BZ

Sent from my T6pro using Tapatalk

YeastFace Brew Co.

Re: Detachable pt100 temperature probe

Post by YeastFace Brew Co. » Fri May 05, 2017 6:34 am

Cheers brewzone, was a bit difficult finding an answer whether NPT and BPS threads were interchangable (or more accuratelt whether it would provide a decent seal) seemed that 1/2" fittings were but good to get some confirmation.

brewzone

Re: Detachable pt100 temperature probe

Post by brewzone » Fri May 05, 2017 10:57 am

Ohm value shouldn't be an issue on say a sestos or Rex c100 when calibrated for zero C.

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YeastFace Brew Co.

Re: Detachable pt100 temperature probe

Post by YeastFace Brew Co. » Fri May 05, 2017 7:41 pm

Arrived today after ordering Wednesday, paid a bit more from one of the UK based obviously Chinese shops. I have an Inkbird 100, will let you know how it fares.

BeerCat

Re: Detachable pt100 temperature probe

Post by BeerCat » Wed Jun 21, 2017 2:50 pm

I have been using one of these for a few months and its excellent. I tested it against 2 thermometers and a 10" SS probe on an STC1000 and its spot on. Have not had to calibrate it.

republicofbeer

Re: Detachable pt100 temperature probe

Post by republicofbeer » Wed Jun 21, 2017 10:16 pm

I may have to order some of those. It the moment I changed the connector at the end to xlr connectors so I can jyst plug them into the wall outlets, but detaching at source looks a much better solution


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brewzone

Re: Detachable pt100 temperature probe

Post by brewzone » Mon Jan 08, 2018 9:33 pm

Been a few months now since I posted to this discussion.

Bought a couple of these PT100 probes and set out to build a dual PID system around an Arduino Mega and RPI3.

Initially I used a diy opamp circuit to connect the PT100's to a UNO but found there was not enough resolution.

Have since bought some MAX31865 amplifier boards which are great.

After a few trial runs on a 33L test system overshoot is down to 0.67C

Running in a simulation this is down to 0.04C

Just got to sort the lag out to achieve the 0.04C on the 33L system and then incorporate this into a RIMS and Herms system.

Image

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