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post #3 of (permalink) Old 11-28-2012, 12:44 AM
Darkblade48's Avatar
Join Date: Jan 2008
Location: Toronto/Singapore
Posts: 10,189
Originally Posted by mcaquatic View Post
or is that i want a monitor? want to use it with my solenoid to run my co2
In this case, you want a pH controller (pH monitor).

A pH meter will only measure the pH.

With the controller, the pH meter will read the pH and then allow the solenoid (that is connected to your CO2) to open/close dependent on the pH.


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