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Sonsivri > Electronics > Projects (Moderators: bbarney, pickit2) > PH probes
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Bluemitts
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« on: February 16, 2012, 08:23:18 20:23 »
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, 09:09:24 21:09 »
http://www.sparkfun.com/products/10972
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sadman
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« Reply #2 on: February 17, 2012, 10:55:46 10:55 »
take look
« Last Edit: February 17, 2012, 10:58:31 10:58 by sadman » Logged
metal
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« Reply #3 on: February 17, 2012, 12:50:19 12:50 »
Can you share the source code :- )
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sadman
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« Reply #4 on: February 18, 2012, 04:01:52 04:01 »
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Can you share the source code


sure my friend
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sadman
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« Reply #5 on: February 20, 2012, 10:16:07 10:16 »
Quote from: Bluemitts on February 18, 2012, 11:24:08 11:24
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 #6 on: February 21, 2012, 04:41:25 04:41 »
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 #7 on: March 02, 2012, 07:24:49 07:24 »
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 #8 on: March 03, 2012, 05:34:34 17:34 »
Found ready device here for 50 euro
http://www.lextronic.fr/P2785-ph-metre.html
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Pny
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« Reply #9 on: December 30, 2012, 06:26:33 18:26 »
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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