I dont know about the ph-4592c module, it unlikely to work with reef-pi. The opensource reef-pi ph module , designed by @Roberto_b is the cheapest option. @Michael Lane sells it in his tindie store. There might be couple others who is producing it. The standalone ph module is cheapest if you are planning to add to an existing build.I haven't so much time to test stuffs, but... 2 temperature sensors successfully tested!!!.
Thank you everyone for the help.
Next step is to setup a ph sensor.
On the adafruit site it's suggested the EZO ph module.
Is it the only module available for reef-pi?
I have a PH-4502C module... is it compatible with the reef-pi system?


