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Author Topic: PH probes  (Read 2782 times)
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Bluemitts
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« on: February 16, 2012, 09:23:18 21:23 »

I am looking for a cheap PH probe for a project, can any body recommend one?
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ravenfeather
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« Reply #1 on: February 16, 2012, 10:09:24 22:09 »

http://www.sparkfun.com/products/10972
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Bluemitts
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« Reply #2 on: February 16, 2012, 10:21:45 22:21 »

thanks, I looked there and some how missed it.

The suppiers of the probes also does other probes I might have to look at as well.
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sadman
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« Reply #3 on: February 17, 2012, 11:55:46 11:55 »

take look
« Last Edit: February 17, 2012, 11:58:31 11:58 by sadman » Logged
metal
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« Reply #4 on: February 17, 2012, 01:50:19 13:50 »

Can you share the source code :- )
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nothing to say..
sadman
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« Reply #5 on: February 18, 2012, 05:01:52 05:01 »

Quote
Can you share the source code


sure my friend
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Bluemitts
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« Reply #6 on: February 18, 2012, 12:24:08 12:24 »

Hi Sadman

A couple of questions about your hardware

How often do you need to recalibrate the probe?
Can it be left immersed ?
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sadman
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« Reply #7 on: February 20, 2012, 11:16:07 11:16 »

Hi Sadman

A couple of questions about your hardware

How often do you need to recalibrate the probe?
Can it be left immersed ?

it require one time calibration

regards
sadman
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sadman
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« Reply #8 on: February 21, 2012, 05:41:25 05:41 »

uploaded proper calibration instruction sorry delayed as i was translating it from french to english

regards
sadman
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enzine
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« Reply #9 on: March 02, 2012, 08:24:49 08:24 »

I found  a very detailed project of a "PH meter" in Elektor 1985-04 -India (see Carmorse and Nidhisahu posts )
In the article is also described the probe and related calibration procedure.
I hope I can be useful.

Ciao
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ravenfeather
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« Reply #10 on: March 03, 2012, 06:34:34 18:34 »

Found ready device here for 50 euro
http://www.lextronic.fr/P2785-ph-metre.html
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Bluemitts
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« Reply #11 on: March 03, 2012, 11:22:40 23:22 »

Found ready device here for 50 euro
http://www.lextronic.fr/P2785-ph-metre.html

The problem with the ready made unit, is that I can not integrate in the project I am working on. It is not just a PH meter I am looking at, but a monitoring solution for marine fish tanks.
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Pny
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« Reply #12 on: December 30, 2012, 07:26:33 19:26 »

If you are going to measure pH in a marine fish tank it might be a good idea to isolate the metering circuit (ie galvanic isolation). Otherwise you could get problems with ground loops due to all other equipment in your tank.
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