Portable Refractometer + Calibration Fluid

Portable Refractometer + Calibration Fluid Agricultural Solutions brand New in package, never used. 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. Questions? Leave a comment below!