The large screen display allows for use with various composite electrodes, enabling measurements on soft objects, meeting both general measurement requirements and the needs of specific customers. Readings can be held, providing convenience, speed, and accuracy. Calibration solutions (liquid or powder) and various packaging options are available according to customer requirements. Application areas: aquariums, aquaculture, fish farming, hatcheries, food processing, laboratories, paper industry, swimming pools, schools, and colleges, etc.