Features: Measure salinity quickly and accurately with our handheld refractometer perfect for marine survey, water quality monitoring, and fish culture. Made with high quality glassprism for precise measurements and adjustable eyepiece for clear readings ensuring reliable results every time. Designed for professionals in agriculture, industry, and research for mariculture, aquarium enthusiasts, and food processing applications. Take our portable salinometer anywhere you need to measure salt concentration from the ocean to your own backyard. Experience the convenience of automatic temperature compensation and easy operation, making salinity measurement a breezefor anyone. Specifications: Material: Metal, Rubber Size: Approx. 17x195x17mm/0.67x7.68x0.67in Package Includes: 1x Salinity Refractometer note: Please allow 1-2cm errors due to manual measurement, make sure that you do not mind before you order. Due to the difference between different monitors, the picture may not reflect the actual color of the item.