This industrial digital pH sensor is a professional online monitoring device designed for real-time acidity and alkalinity detection in various water bodies. It features dual output (RS485 Modbus RTU + 4-20mA) for flexible integration with industrial control systems, high precision (±0.02 pH), IP68 waterproof protection, and automatic temperature compensation. Suitable for wastewater treatment, aquaculture, chemical processing, drinking water monitoring and other industrial scenarios, it provides stable, reliable and accurate data support for production and environmental management, with simple operation and low maintenance costs.