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Old 04-06-2010, 12:04 AM   #1
ALF
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Default DIY pH Meter

Just stumbled across this and thought I would share.

http://www.66pacific.com/ph/simplest_ph.aspx


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Old 04-06-2010, 12:42 AM   #2
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Although that looks simple to me (I'm an avionics tech and work with schematics/electronics daily) I think your every day joe schmoe might have a seizure while reading that article. Let alone trying to put one together.

Sorry if I sound harsh.


I might just give that a go, with all the "extra" parts that the govt. has lying around my shop.


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Old 04-06-2010, 01:39 AM   #3
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I like the idea, however there are alot of cheap digi ph meters out there, plus this design doesn't seem to address temperature compensation so I'd worry about that.
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Old 04-06-2010, 02:36 PM   #4
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Woah, way cool.

As for Budzu's comment, I think any temp compensation, (if it exists), would be in the probe, would it not? Unless the probe also has a thermistor/thermocouple that also outputs to your standard digi pH meter, a standard pH meter would have no way of knowing the temperature...all it gets is a voltage reading from the probe, same as this circuit...

Be sweet to hook this up to a brewing computer...
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Old 04-06-2010, 02:39 PM   #5
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Quote:
Originally Posted by Budzu View Post
I like the idea, however there are alot of cheap digi ph meters out there, plus this design doesn't seem to address temperature compensation so I'd worry about that.
I worry more about if you really know what ATC is about. And how it is applied to your meter.

Maybe you do.

Most don't.

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Old 04-06-2010, 04:04 PM   #6
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Care to rephrase GilaMinumBeer? Otherwise you're just sounding like a douche.
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Old 04-06-2010, 05:15 PM   #7
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Quote:
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Care to rephrase GilaMinumBeer? Otherwise you're just sounding like a douche.
That was wet and below the belt LOL!
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Old 04-06-2010, 06:42 PM   #8
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Care to rephrase GilaMinumBeer? Otherwise you're just sounding like a douche.
Done. Take it how you want. Balsamic or distilled white.

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Old 04-06-2010, 06:50 PM   #9
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Thats neat but, most of the cost of a pH meter is the probe so this doesn't save a ton of money.
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Old 04-06-2010, 06:59 PM   #10
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Looks like it is time to get my soldering iron back out. Prep some copper sheets and some acid.

That looks a really simple circuit. It will be fun to see how well it works. Maybe I will incorporate it into the design of my new system.


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