pH Meter Module - September 2023 - Silicon Chip Online
This module is designed to form the basis of a liquid pH meter, for testing the acidity or alkalinity of things like the water in fish tanks or swimming pools, or the liquid in a vat when you’re making beer or wine. It comes complete with two pH sensor probes, and can be easily hooked up to an Arduino or other microcontroller to form a pH meter. by Jim Rowe
Source: siliconchip.com.au