Portable Handheld Refractometer 0-28% Salinity Meter

Extech Portable Salinity Refractometer with 0 - 100 ppt and 1.000 - 1.070 refractive index offers accurate and repeatable measurements on easy to read scale and features Automatic Temperature Compensation (ATC) from 10 to 30 deg C. Needs only 2 or 3 drops of solution for a reading.
Features
Used to measure the salinity of the water.
Sturdy and light weighted Aluminum body.
Superior quality rubber grip.
High quality and accurate testing result.
Can be easily calibrated with a mini-screw driver.
Automatic temperature compensation (ATC).
Easy to use, convenient to carry.
Specifications
Salinity Range 0 - 28%
Automatic Temperature Compensation System Yes
Version Traditional Version
Dimension 168 x 39 x 39 mm
Weight 230g