Fast, Digital Nitrate Testing for Saltwater Aquariums

Take the guesswork out of nitrate testing with the Hanna Instruments HI782 Marine Nitrate High Range Checker HC.

Designed specifically for saltwater aquariums and marine applications, the HI782 provides a clear digital nitrate reading without relying on color charts or trying to decide which shade your test sample matches.

With a testing range of 0.0 to 75.0 ppm nitrate, the HI782 is an excellent everyday testing tool for reef tanks, fish-only marine systems, and other saltwater aquariums where nitrate monitoring is an important part of maintaining water quality.

Digital Results Without Color Matching

Traditional nitrate kits require visually comparing a sample against a color chart. The HI782 uses a handheld colorimeter to analyze the sample and display the nitrate concentration directly on its LCD screen.

Simply prepare your sample using the included reagent and follow the testing procedure for an easy-to-read digital result.

Made Specifically for Seawater

The HI782 was developed specifically for nitrate testing in seawater.

It measures nitrate from 0.0 to 75.0 ppm as NO₃⁻ with a resolution of 0.1 ppm, making it useful for monitoring both nutrient-controlled reef systems and marine aquariums running at higher nitrate levels.

Simple One-Reagent Testing

The HI782 uses a streamlined testing procedure requiring only one reagent packet per test, making regular nitrate monitoring easier to incorporate into aquarium maintenance.

Key Features

• Designed specifically for saltwater and marine aquariums
• Digital nitrate readings with no visual color matching
• Measures nitrate from 0.0 to 75.0 ppm
• 0.1 ppm resolution
• Accuracy of ±2.0 ppm ±5% of reading at 77°F
• Simple one-button operation
• Requires only one reagent per test
• Compact handheld design
• Automatic shutoff after 10 minutes of inactivity
• Replaceable AAA battery
• Replacement HI782-25 reagent sets available separately

Specifications

Model: HI782
Parameter: Nitrate
Range: 0.0 to 75.0 ppm as NO₃⁻
Resolution: 0.1 ppm
Accuracy: ±2.0 ppm ±5% of reading at 77°F / 25°C
Method: Zinc Reduction Method
Light Source: LED at 525 nm
Light Detector: Silicon photocell
Battery: 1 × 1.5V AAA
Auto Shutoff: After 10 minutes of inactivity
Dimensions: 3.4" × 2.4" × 1.5"
Weight: 2.3 oz

What's Included

• Hanna Instruments HI782 Marine Nitrate High Range Checker HC
• 2 sample cuvettes with caps
• Starter reagent kit for 10 tests
• 3 mL Pasteur pipette
• AAA battery
• Instruction manual
• Protective carrying case with custom insert

Why Buy From Infinity and Beyond Aquatics?

Reliable water testing is one of the foundations of a healthy aquarium. Infinity and Beyond Aquatics carries testing equipment for aquarists who want straightforward, repeatable information about what's happening in their water.

The Hanna HI782 makes routine nitrate testing easy to read and eliminates one of the biggest frustrations of traditional test kits: interpreting color charts.

Shipping

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