The most widely tested and studied chemical water parameterin chemistry, biology, and environmental studies is pH. Educational institutions use a wide variety of pH sensors to demonstrate how pH values are measured and interpreted. Overall, the inclusion of pH theory and measurement in various educational curriculums provides students with essential scientific knowledge and practical skills applicable across multiple disciplines. pH sensors can be custom designed to suit both general purpose or specific research application needs. Trade-offs between performance, durability, and cost-efficiency should be considered when designing a sensor.