5-In-1 Multi-Function Tester Fast and reliable water quality checks in a single instrument. This tester provides key measurements for seawater and general water quality, with simple operation and quick mode switching. Key benefits - Consolidated measurements: 5-in-1 functionality enables quick assessment of seawater salinity and total dissolved solids (TDS) in one device, helping you monitor and manage water quality efficiently. - Seawater salinity reading: Salinity is the ratio of total dissolved solids to the weight of seawater and is usually expressed in grams per kilogram (ppt). Measuring range: 10.1 to 200.0 ppt. - Total dissolved solids (TDS): Measures TDS in water from 1 to 20000 ppm, useful for evaluating nutrient levels, dilution, and water purity. - One-click mode switching: Switch between measurement modes instantly for faster workflow and reduced setup time. Specifications highlighted - Seawater salinity range: 10.1–200.0 ppt - Salinity expression: grams per kilogram of seawater (ppt) - Total dissolved solids range: 1–20000 ppm - Mode switching: One-click operation Practical use scenarios - Saltwater aquarium maintenance: Regularly check salinity and TDS to maintain stable conditions for marine life and reef systems. - Hydroponics and nutrient solutions: Monitor TDS to ensure appropriate nutrient concentrations and optimize plant growth. - Field testing and research: Quickly assess seawater samples or water quality in laboratory, classroom, or on-site settings. This device offers a straightforward, professional approach to monitoring critical water quality parameters with clear measurements and easy operation.