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PH controller

I have one of each controller and monitor less than a year old.
 
Looking for cheapest way to monitor pH. Looks like if i build myself im almost at 100$? Anyone point me in the direction of bare minimum needed to hook up directly to pi3?

It cost me 8$ to get temp working....
 
Atlas scientific has the boards you need but will be more than 100$ I have one built with temp ph modules.
 
Atlas scientific has the boards you need but will be more than 100$ I have one built with temp ph modules.
Is this my only option? seems a bit high. looking for a 30-40$ solution if one exists.
 
Is this my only option? seems a bit high. looking for a 30-40$ solution if one exists.
Yeah not if it's going to be a controller I do have a monitor only that I can let go 75$ with the probe you originally asked for the controller big difference.
 

IF YOU HAD TO TAKE A REEFING EXAM, WOULD YOU PASS?

  • Yes!

    Votes: 32 45.7%
  • Not yet, but I have one that I want to buy in mind!

    Votes: 9 12.9%
  • No.

    Votes: 26 37.1%
  • Other (please explain).

    Votes: 3 4.3%

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