Fast, Accurate Digital Salinity Testing for Saltwater Aquariums

Take the guesswork out of measuring salinity with the Hanna HI98319 Marine Salinity & Temperature Tester. Designed specifically for reef and marine aquariums, this waterproof digital tester provides fast, accurate salinity measurements in parts per thousand (ppt), Practical Salinity Units (PSU), or Specific Gravity (S.G.), along with simultaneous temperature readings.

Unlike traditional refractometers that require manual interpretation and frequent adjustments, the HI98319 uses a precision graphite conductivity probe and automatic temperature compensation to deliver dependable digital readings in seconds. Whether you're mixing new saltwater, performing routine maintenance, or verifying your aquarium's salinity, the HI98319 makes testing quick, simple, and consistent.

Built with a rugged waterproof housing and ergonomic design, the HI98319 is ideal for both home reef hobbyists and professional aquarium maintenance. The large LCD display clearly shows salinity and temperature, while one-button automatic calibration keeps the tester ready for reliable measurements whenever you need it.

Key Features

• Measures salinity in ppt, PSU, or Specific Gravity (S.G.)
• Simultaneously displays water temperature
• Waterproof design for reliable aquarium use
• Automatic Temperature Compensation (ATC)
• Precision graphite conductivity probe
• One-point automatic calibration at 35.00 ppt
• Large, easy-to-read LCD display
• Simple two-button operation
• Auto shut-off to conserve battery life
• Ideal for reef aquariums, fish-only systems, and saltwater mixing stations

Perfect For

• Reef Aquariums
• Fish-Only Saltwater Aquariums
• Coral Frag Systems
• Saltwater Mixing Stations
• Professional Aquarium Maintenance
• Marine Aquarium Hobbyists

Specifications

• Model: HI98319
• Salinity Range: 0.0–70.0 ppt
• PSU Range: 0.0–70.0 PSU
• Specific Gravity Range: 1.000–1.041 S.G.
• Temperature Range: 32.0–122.0°F (0.0–50.0°C)
• Salinity Resolution: 0.1 ppt / 0.1 PSU / 0.001 S.G.
• Temperature Resolution: 0.1°F / 0.1°C
• Salinity Accuracy: ±1 ppt (0–40 ppt), ±2 ppt (40–70 ppt)
• Specific Gravity Accuracy: ±0.001 S.G.
• Temperature Accuracy: ±0.5°C (±1°F)
• Calibration: Automatic single-point (35.00 ppt)
• Automatic Temperature Compensation: Yes
• Battery: CR2032 (included)
• Battery Life: Approximately 100 hours of continuous use

What's Included

• Hanna HI98319 Marine Salinity & Temperature Tester
• Protective Storage Case
• Four 35.00 ppt Calibration Solution Sachets
• CR2032 Battery
• Instruction Manual
• Quality Certificate

Why You'll Love It

Maintaining proper salinity is one of the most important aspects of a healthy saltwater aquarium. The HI98319 removes the uncertainty of analog refractometers by providing fast, digital measurements with exceptional consistency. Whether you're preparing fresh saltwater or checking your display aquarium, you'll spend less time guessing and more time enjoying your reef.

Why Buy from Infinity and Beyond Aquatics?

At Infinity and Beyond Aquatics, we carefully select equipment trusted by serious reef hobbyists and professionals. The Hanna HI98319 delivers dependable digital salinity testing, helping you maintain stable water parameters with confidence.

Shipping Information

Shipping Available Nationwide

This item ships within 1–3 business days, and tracking information will be emailed as soon as your order ships.

• FREE Standard Shipping on qualifying orders over $100 (U.S. only)
• Orders below the free shipping threshold are calculated at checkout based on your selected shipping method.
• This item is carefully packaged to help ensure it arrives in excellent condition.