Valencia

The reason its because Neptume system is using Galvanic Isolation componets instead of regular amplifiers, I am using TL084D in pH and ORP modules.

I found the photo on the web, and i want to know the part number, because I already have a project and i want to expand it, I am using regular amplifiers, but I was reading that Neptune System is using components more accurate, I have the pH and ORP modules, but I am developing Calcium and Nitrates DIY modules, and I want to use the same precision components. I will post circuits and diagrams to share the project.

does anybody could help me to identify these components?