Marine Nitrate Checker for Saltwater Aquariums, Digital HI782 Colorimeter for Clear Readings from 0.0 to 75.0 ppm

Keep a closer eye on nitrate in your saltwater aquarium using the HI782 Marine Nitrate High Range Colorimeter. It measures nitrate from 0.0 to 75.0 ppm and displays the result digitally, so you do not have to judge subtle color differences by eye.

Built specifically for seawater samples, this compact checker gives marine aquarium keepers a practical way to track a key part of the nitrogen cycle. Regular, readable results can guide informed aquarium maintenance when rising nitrate may encourage unwanted algae or dinoflagellate growth.

Key Features

• The digital readout removes the uncertainty of visually matching colors, making each result easier to interpret during routine water checks.
• A 0.1 ppm resolution provides useful detail across the checker’s 0.0 to 75.0 ppm measurement range.
• Testing requires only one reagent, keeping the nitrate-checking process less complex for regular aquarium care.
• Its dedicated nitrate measurement keeps the checker focused on one important saltwater parameter.
• The compact 86.0 x 61.0 x 37.5 mm body is convenient to store near other aquarium testing supplies.
• Automatic shutoff after 10 minutes of non-use helps conserve the included AAA battery between testing sessions.

Specifications

• Brand: Hanna
• Model: HI782
• Application: Saltwater and seawater samples
• Measurement range: 0.0 to 75.0 ppm (as NO3–)
• Resolution: 0.1 ppm
• Accuracy: ±2.0 ppm ±5% of reading at 25°C (77°F)
• Method: Zinc reduction method
• Light source: LED at 525 nm
• Light detector: Silicon photocell
• Battery: One 1.5V AAA battery
• Auto-off: After 10 minutes of non-use
• Operating environment: 0 to 50°C (32 to 122°F); maximum 95% RH, non-condensing
• Dimensions: 86.0 x 61.0 x 37.5 mm (3.4 x 2.4 x 1.5 inches)
• Weight: 64 g (2.3 oz)

Use this checker as part of a consistent saltwater aquarium routine to follow nitrate changes through a clear numerical result. For continued testing, the compatible HI782-25 Nitrate High Range Checker Reagents are available separately in a 25-test pack.