Agriculture Solutions Salinity Refractometer for Seawater and Marine Fishkeeping Aquarium 0-100 PPT with Automatic Temperature CompensationBrand: Agriculture Solutions Features: Measure salt water or salinity of water, ideal for aquariums and marine monitoring. Measures on 2 scales, Specific Gravity (D 20 20) and parts per thousand. Features automatic temperature compensation. Comes with hard case, dropper, screwdriver, user manual and cleaning cloth. The main part is made of chromium, it's very durable. Binding: Target model number: WL0020 ATC Part Number: WL0020 ATC EAN: 0710824285742