Cleaned up the prototype for PH sensor

I have made some changes to my PH Sensor project.  I moved it off the breadboard and did a bit of clean-up and soldered it on a perf board.  Much cleaner with screw down terminals for the external sensors.

One problem that I am having, that I have to resolve is that the probe is stuck on 2.5v.  Might be some problems with my wiring.  but it could also be the el-cheapo probe.  I’ll connect it to an Arduino and retest it outside of my project to see the results.

Here is the device in a saltwater fish pen monitoring PH to make sure the fish are in acceptable levels.

More to come.