This dual scale salinity refractometer is used to measure, monitor and control the concentration of salt water and brine. It is especially useful for aquariums and marine applications. This high quality refractometer measures on 2 scales, Specific Gravity (D 20/20) and parts per thousand. It can replace your difficult to read hydrometer. Just a couple drops of aquarium water and you know exactly what your salinity is.

This Refractometer is backed by a 2 Year - No Hassle - Free Replacement Guarantee. It is suitable for a marine saltwater tank. Sturdy design, compact in size and light in weight, convenient to keep up and carry around. Features ATC (Automatic Temperature Compensation) for accurate readings. One scale checks the NaCl levels with the range of 0-100 ppt (with 1 ppt scale divisions) and the other scale gauges Specific Gravity with a range of 1.000 to 1.070(+/-0.001 accuracy).

Best Sellers Rank: See Top 100 in Pet Supplies. Country of Origin: China. : B005ES6MOQ. Manufacturer: Ade Advanced Optics. Date First Available: July 27, 2011. Item model number: SSA0010. Product Dimensions: 2 x 2 x 7 inches; 6.4 Ounces. Is Discontinued By Manufacturer: No.