Salinity Refractometer with Automatic Temperature Compensation, 0-100 PPT Hydrometer for Seawater, Marine Fish

Designed to measure salinity in saltwater and monitor marine environments, this instrument provides readings suitable for home aquariums or small-scale research setups. It offers two measurement scales, including Specific Gravity (D20/20) and parts per thousand, so you can compare salinity using the unit you prefer. Automatic temperature compensation helps keep results stable across typical room and tank temperatures, reducing the need for manual adjustment. The device is built with a chromium main body for durability and corrosion resistance, making it capable of withstanding routine use around water and salt spray. A hard case protects the instrument during storage and transport, while the included dropper, screwdriver, user manual and cleaning cloth support setup and maintenance. Proper operation involves calibrating with known reference solutions and taking readings after allowing the solution to equilibrate, then noting changes as environmental conditions vary. The instrument is designed for repeated use in aquatic settings, providing consistent readings to help track changes in salinity over time. It is compact and simple to use, with straightforward interfaces that respond quickly to changes in the solution being measured. Regular cleaning after use helps prevent residue buildup and keeps readings reliable across seasons and tank conditions for long-term use.