HI98319 is a digital salinity tester designed specifically for saltwater aquariums and displays results in parts per thousand (ppt), Practical Salinty Units (PSU), or specify gravity (S.G.).
This waterproof tester uses an amperometric conductivity probe to determine the salt content in the water. This robust tester displays the readings along with termperature on a large LCD.
The rugged waterproof tester is only 0.7" thick and extremely ergonomic, fitting comfortably in your hand. It keeps things simple with a two-button operation, one for ON/OFF, the other for calibration.