AUTOUTLET Salinity Refractometer, Automatic Temperature Compensation Salt Water Tester Hydrometer 0 100 ppt & 1.000 1.070 Specific Gravity ATC Refractometer for Sea Aquarium Tank Marine Industry

【SalinIty Refractometer】 Measure Salt Water or Salinity of Water, Monitor anD Control the Concentration of Salt Water and Brine, Ideal for Aquariums and Marine Applications 【Measures on 2 Scales】 SpecIfic Gravity (D 20/20) and parts per thousand and replaces your poor quality and difficult-to-read hydrometer 【Density Measurement Range】 1.0-1.070, Minimum Scale is 0.001 【Concentration Measurement Range】 0-100‰, Minimum Scale is 1‰ 【ATC】 Automatic Temperature Compensation, 0-10 °C; ① It is necessary to keep the surrounding environment with sufficient brightness and a suitable temperature during use. There is no error when the temperature is 10-30 ℃. If it deviates from this temperature, there will be a certain error. ② Because people’s focal lengths are different, reverse rotation may be necessary when focusing, Weight: 0.53 Pounds, Manufacturer: AUTOUTLET