Re: [DIYbio] pH kit ( was: Microcontrollers)

Would it work to just connect the LCD/LED matrix output lines and
monitor them? you could find the update time by titrating a solution
and oversampling the display screen to find the refresh frequency.

On Thu, Sep 27, 2012 at 5:12 PM, Simon Quellen Field <sfield@scitoys.com> wrote:
> One of us could probably open that up and get to the signals to
> connect it to a microcontroller.
>
> But pH meters need to be calibrated fairly often, so it would still not be
> a build-and-forget type of sensor.
>
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> On Thu, Sep 27, 2012 at 2:01 PM, Dakota <dkotes@gmail.com> wrote:
>>
>> Oh wow woops, didn't realize that was just a conductivity meter,
>> thought it was pH as it came up under a quick amazon search.
>>
>> Something like this then,
>>
>> http://www.amazon.com/Milwaukee-Instruments-PH55-Waterproof-Tester/dp/B002SGKE8W/ref=sr_1_2?s=lawn-garden&ie=UTF8&qid=1348779199&sr=1-2&keywords=pH+meter
>>
>> Even cheaper, and does pH and temp.  For $40 I'd probably take that
>> for making buffers, but in the case of someone wanting to constantly
>> monitor an environment, I can see how the micro controller / pH board
>> with constant data logging would be superior to taking daily
>> measurements with a handheld.
>>
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Nathan McCorkle
Rochester Institute of Technology
College of Science, Biotechnology/Bioinformatics

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