Saltwater Aquarium for Seawater, Pool, Tank, Testing

Refractometer Saltwater Aquarium for Seawater, Pool, Tank, Testing, Marine Fishkeeping, 0-100PPT &  1.000-1.070 Salinity Tester with ATC Function Hydrometer Specific Gravity Salinity Meter Kit

• Measure Salt Water or Salinity of Water, Monitor and Control the Concentration of Salt Water and Brine, Ideal for Aquariums and Marine Applications.
• Specific Gravity (D 20/20) and components per thousand and replaces your poor high quality and tough to learn hydrometer.
• 1.0-1.070, Minimum Scale is 0.001.
• 0-100‰, Minimum Scale is 1‰.
• Automatic Temperature Compensation, 0-10°C.