The HAMP-4000 is a multi-parameter water quality sensor optimized for environmental monitoring sites such as rivers and dams. It can simultaneously measure five key parameters: water temperature, electrical conductivity (EC), hydrogen ion concentration (pH), turbidity, and dissolved oxygen (DO). The sensor is integrated into a single housing for ease of installation and compactness, and its temperature compensation function minimizes measurement errors caused by sample temperature fluctuations. The HAMP-4000’s touchscreen display allows for real-time measurement value confirmation and data visualization. Alarm settings, output signal settings, automatic cleaning, data query, and calibration history management enhance on-site operation and maintenance convenience. The data logger function supports long-term analysis of environmental changes. It is applicable not only to river and dam environmental monitoring but also to a variety of environmental sites, including effluent from water and sewage treatment plants, agricultural water, and industrial complex effluent.