Liquid pH Sensor Module with BNC Electrode Probe
Real‑time liquid pH monitoring with a rugged BNC‑plugged sensor module—compact, precise, and ready for any environment.
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Liquid pH Sensor Module with BNC Electrode Probe – a rugged, plug‑and‑play solution for measuring the acidity or alkalinity of any liquid in real time. The compact board houses a high‑resolution 16‑bit ADC, a built‑in temperature compensation circuit, and a BNC‑mounted glass electrode that can be immersed directly in water, soil extracts, fermentation broths, or any environmental sample. Designed for classroom labs, undergraduate research, and maker‑space projects, the module connects to Arduino, Raspberry Pi, or any microcontroller via a simple analog or I²C interface, delivering pH readings from 0 to 14 with ±0.01 pH accuracy.
What students will learn
- Fundamentals of electrochemical sensing and how glass‑membrane electrodes translate hydrogen‑ion activity into voltage.
- Calibration techniques using standard buffer solutions and the importance of temperature compensation.
- Data acquisition, signal filtering, and real‑time plotting in Python, LabVIEW, or the Arduino IDE.
- Practical applications such as monitoring water quality, hydroponic nutrient solutions, acid‑base titrations, and environmental impact studies.
Key features
- BNC‑type glass electrode (replaceable, chemically resistant, 0‑14 pH range)
- 16‑bit ADC with ±0.01 pH resolution and ±0.02 pH repeatability
- Integrated temperature sensor (±0.5 °C) for automatic compensation
- Dual output: analog voltage (0‑5 V) and digital I²C (0‑3.3 V) for flexible interfacing
- Auto‑calibration routine and EEPROM storage of two buffer points
- Robust housing (IP65 rated) suitable for field work and wet‑lab environments
- Power‑efficient design (≤50 mA) and optional battery operation for portable setups.
Why it’s great: the module bridges theory and hands‑on experimentation, letting students instantly see how pH influences biological, chemical, and ecological processes. Its precision, easy wiring, and comprehensive software libraries cut setup time to minutes, so learners can focus on experimental design and data analysis rather than hardware hassles. Whether probing a river’s health, optimizing a DIY hydroponic garden, or conducting a classroom acid‑base titration, this sensor delivers laboratory‑grade performance at an affordable, classroom‑friendly price.