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Hanna Instruments Salinity Tester (HI98319)


Item #: HN8319

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The Hanna Instruments Marine Salinity and Temperature Tester (HI98319) was designed to simplify testing your salt mix`s salinity and temperature in seconds, with reading results in parts per thousand (ppt), Practical Salinity Units (PSU), or specific gravity (S.G.).

This waterproof tester uses a graphite amperometric conductivity probe, which is resistant to oxidation, improving the measurement repetition to determine the salt content in the water. The use of a graphite probe also reduces the polarization effect common with testers that use two stainless steel pins.

Calibration is performed by pressing the dedicated calibration button. Once in calibration mode, the probe is placed in 35.00 ppt calibration standard. When the standard value is recognized and stability reached, the meter will automatically accept and store the value. 

The Hanna Marine Salinity Tester displays the readings along with temperature on an easy to read large LCD screen. 

Better Features for Better Testing

  • With an onscreen stability indicator you can be confident in the reading results.  
  • The included auto-off feature will save energy, lengthening your battery life.

Pocket Sized

  • Perfect size for on-the-go testing.
  • With large LCD screen, you will be able to view the readings at a glance from any angle.

Long Battery Life

  • The CR2032 Li-ion battery will provide up to 100 hours of use.
  • The battery icon will blink when it is time to change the battery.

Graphite Sensors

  • Graphite sensors reduces polarization effects and does not oxidize, giving you a more reliable and accurate reading.

Durable Case

  • The design of this tester can withstand drops, knocks, and spills.
  • The waterproof body will protect the tester from any intrusion

Integrated Temperature Probe

  • Conductivity measurements are highly sensitive to temperature variations, which the exposed temperature sensor helps compensate for.
  • The temperature probe takes these variations into consideration to ensure accuracy.


Range 0.0 to 70.0 ppt (g/L)

0.0 to 70.0 PSU

1.000 to 1.041 S.G.

Resolution 0.1 ppt (g/L); 0.1 PSU; 0.001 S.G.
Accuracy (@25ºC/77ºF) ±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.

Temperature Range 0.0 to 50.0°C; 32.0 to 122.0°F
Temperature Resolution 0.1°C; 0.1°F
Temperature Accuracy (@ 25°C/77°F) ±0.5°C; 1°F
Calibration automatic, single point 35.00 ppt
Method 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

Weight 68 g (2.4 oz.) without battery
Temperature Compensation automatic from 5 to 50.0 ºC
Battery Type / Life CR2032 3V Li-Ion (1 pc.)/ approximately 100 hours of continuous use
Environment 0 to 50 °C (32 °C to 122 °F); RH max 100%
Ordering Information Each meter is supplied with: CR2032 battery (inside the meter), Storage / Protection sleeve, Instruction manual, Quality certificate, and 35.00 ppt calibration standard sachet (4 pcs.)

Manufacturer information

Hanna Instruments USA Aquarium Supplies
Hanna Instruments is a leading manufacturer of analytical aquarium instrumentation. They were founded in 1978 and are headquartered in Woonsocket, Rhode Island. When Hanna introduced pH Electronic Paper in 1986 it literally revolutionized the world of testing by allowing millions of people in various industries to test for pH in a simple, accurate and affordable way. Hanna employees are constantly challenging themselves to improve on existing technology and to invent new testing techniques with the common goal to simplify analytical testing. This applies not only to instrumentation, but also to sensors development, reagents and chemicals. Hanna also believes in controlling the quality of their products from inception to delivery so they manufacture everything themselves, from meters and electrodes to chemical reagents and buffer solutions.

5 Stars


Reviewed on
October 27, 2020

Yes, I would recommend this.

Quick and accurate

Pros: Quick

Cons: Calibration fluid cost too much.

One of the best gadgets I purchased. Fast and you don’t have to find a good light source. Quick calibration but the additional calibration fluid is way overpriced.

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Reviewed on
September 13, 2020

Yes, I would recommend this.

Great device for salinity testing

Pros: fast easy to calibrate

Cons: none

The most accurate tester i have had. No more reading the refractometer or swing arm testers. fast and accurate.

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Reviewed on
July 26, 2020

Yes, I would recommend this.

Awesome product

Pros: Ease of use

Cons: None

By far this has been the best "gadget" I have ever purchased for my aquarium. So easy to use. Just calibrate, dip in water to be tested, and read the results.

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Reviewed on
July 21, 2020

Yes, I would recommend this.


Pros: Everything in it...

Cons: Nothing till now...

What an awesome device!
I am just thinking why I didnt go for it at the beginning and purchased a manual one.The device is not instant reading provider, which gives you the feeling that it is working /analyzing. Bonus is it read the temperature as well relative to your salinity. It also allows you to change the unit of display from SG, PPT, etc. and Celsius to Fahrenheit.

The calibration is perfect and comes with few packs of reference liquid. Wish there were a wiping cloth too :)

Was this review helpful? 1 0


Reviewed on
July 14, 2020

Yes, I would recommend this.

Fast and accurate

Pros: Fast, Easy, and accurate

Cons: none

I love this thing. I wish I had purchased one a long time ago!

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Reviewed on
July 03, 2020

Yes, I would recommend this.

Super awesome!

Pros: Easy setup and use,

Cons: None

This is so much better than using an "idiot box" or a refractometer. Easy to set up and has several options. Makes my saltwater mixing so much easier.

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Reviewed on
June 07, 2020

No, I would not recommend this.

Only lasted 5 Weeks!

Unit is turning on and off repeatedly . Tried rot rest by removing battery but it doesn't work Rea don form that Hanna claim they never saw this before but other had had this same issue. Never again Hanna!

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Reviewed on
May 28, 2020

Yes, I would recommend this.

excellent product

Pros: easy to use and calibrate and measure

Cons: I have not found any problem

Hello, I am very happy with my purchase. I had a manual meter but I was not confident when using Hanna I realized that my salt was 4 points above now I can be calmer and with the correct salinity. excellent product

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Reviewed on
May 11, 2020

Yes, I would recommend this.

Very accurate

Pros: easy to use

Cons: none

ready is easy to use just stick it in water and reads in matter of seconds

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Reviewed on
April 22, 2020

Yes, I would recommend this.

Makes checking salinity quick and painless

Pros: Quick testing of salinity and temp

Cons: Needs to be rinsed with rodi water

Finally a digital tester from a reputable company that's affordable. It's small so you can just tuck it into your pocket and waterproof so no worries about it getting wet. Calibration was quick and includes enough calibration fluid good for several months. The only small gripe I have is having to rinse it in rodi water after each use and always having that readily accessible isn't possible.

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