HI98319 Marine Salinity Tester

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  • Regular price $172.00

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.




0.0 to 70.0 ppt (g/L)

0.0 to 70.0 PSU

1.000 to 1.041 S.G.

0.0 to 50.0°C; 32.0 to 122.0°F


0.1 ppt (g/L)

0.1 PSU


0.1°C; 0.1°F

Accuracy @ 25 oC/ 77 oF

±1 ppt for 0.0 to 40.0 ppt; ±2 ppt for readings over 40.0 ppt

±1 PSU for 0.0 to 40.0 PSU ; ±2 PSU for readings over 40.0 PSU

±0.001 S.G.

±0.5°C; 1°F


ppt - International Oceanographic Tables

PSU - Standard Methods for the Examination of Water and Wastewater, 2510 B, Electrical Conductivity Method

S.G.- Standard Methods for the Examination of Water and Wastewater, 2510 C, Density Method


automatic, one point at 35 ppt

Temperature Compensation

automatic from 5.0 to 50.0°C (41.0 to 122.0°F)

Battery Type / Life

CR2032 3V Li-ion  (1) / approximately 100 hours of continuous use

Automatic Shut-Off

8 minutes, 60 minutes, or disabled


0 to 50°C (32 to 122°F); RH max 100%


160 x 40 x 17 mm (6.3 x 1.6 x 0.7“)


68 g (2.4 oz.) without battery