PH SENSOR MODULE 

The pH Sensor Module is a precision analytical device designed to measure the acidity or alkalinity of liquids, providing pH readings from 0 to 14. It is widely used in water quality monitoring, agriculture, aquaculture, chemical processing, laboratories, and educational projects.

The module typically consists of a glass electrode (probe) and a signal conditioning circuit. The probe is sensitive to hydrogen ions in the solution and generates a small voltage proportional to the pH level. The signal conditioning module amplifies and stabilizes this voltage, delivering a readable analog or digital output that can be interfaced with microcontrollers like Arduino, ESP32, ESP8266, Raspberry Pi (via ADC), or PLC systems.

With an operating voltage of 3.3–5 V DC, the sensor offers reliable performance and can be calibrated for accuracy, typically within ±0.1 pH. Many models include waterproof probes and support manual or software-based temperature compensation to ensure precise measurements across varying conditions.

The pH Sensor Module is ideal for applications such as water and wastewater testing, hydroponics and aquaponics monitoring, aquaculture management, environmental monitoring, and laboratory experiments. Its compact design and easy integration make it a practical tool for DIY electronics projects, STEM education, and professional research.