Hanna HI782 Nitrate High Range Colorimeter Marine Water

Hanna HI782 Nitrate High Range Colorimeter Marine Water

Hanna HI782 Nitrate High Range Colorimeter Marine Water is a handheld digital nitrate tester for measuring nitrate concentration in saltwater aquariums and other marine applications. Known as the HI782 Nitrate Checker HC from Hanna Instruments, it uses the zinc reduction method and shows the result on a digital display, so you don't have to judge colours by eye. It suits reef keepers, fish-only marine hobbyists and anyone in marine biology who needs dependable high-range nitrate readings.

Why Nitrate Testing Matters in Marine Aquariums

Nitrate is a by-product of the nitrogen cycle, so it builds up steadily in every closed saltwater system. Too much nitrate in reef and fish-only aquariums can encourage algae, dinoflagellates and other unwanted organisms. These can quickly choke filtration, block lighting and smother sessile organisms such as corals.

The HI782 reads from 0.0 to 75.0 ppm, which makes it well suited to the higher nitrate levels often found in saltwater tanks. Regular checks give you real numbers to guide water changes, feeding and nutrient control.

Key Benefits

• Designed to accurately measure nitrate levels in aquariums and marine biology applications
• High measuring range of 0.0 to 75.0 ppm, suited to the elevated nitrate levels common in saltwater aquariums
• Digital readout removes the guesswork of matching colours by eye
• Needs only 1 reagent, which keeps testing simple
• No filtration step is needed during testing
• Easier to use and more accurate than chemical test kits, according to the manufacturer
• Dedicated to a single parameter, nitrate, for focused and repeatable testing
• Simple one-button operation
• Large LCD digital display for clear, convenient reading
• Automatic shut-off after 10 minutes of non-use so the battery isn't drained
• Compact size for easy travel and storage
• A simple, accurate and cost-effective way to monitor nitrate in your saltwater aquarium

How to Use

• Take a sample of aquarium water using the supplied 3 mL Pasteur pipette and the sample cuvette.
• Add the single reagent from the Marine Nitrate High Range Starter Kit. No filtration step is required.
• The reagent reacts with nitrate in the sample using the zinc reduction method and turns the sample pink.
• The Checker measures this colour change with its LED light source and silicon photocell, then displays the nitrate concentration in ppm on the LCD.
• Operation uses a single button. Follow the included instruction manual for the full step-by-step procedure.

Suitable For

• Reef aquariums
• Fish-only marine aquariums
• Marine biology and other saltwater testing applications
• Hobbyists who want a digital alternative to colour-chart chemical test kits

Compatibility

The HI782 is designed for marine (saltwater) use. Nitrite is listed as an interference, so high nitrite levels in the sample may affect the nitrate reading.

Specifications

• Range: 0.0 to 75.0 ppm (as NO3-)
• Resolution: 0.1 ppm
• Precision: ±2 ppm ±5% of reading at 25°C (77°F)
• Light source: LED at 525 nm
• Light detector: Silicon photocell
• Method: Zinc reduction method; the reaction between nitrate and the reagent turns the sample pink
• Interferences: Nitrite
• Operating environment: 0 to 50°C (32 to 122°F); max 95% RH, non-condensing
• Battery type: (1) 1.5V AAA
• Auto-off: After 10 minutes of non-use
• Dimensions: 86 x 61 x 37.5 mm (3.4 x 2.4 x 1.5")
• Weight: 64 g (2.3 oz)

What's Included

• 1x HI782 Checker HC
• 1x Sample cuvette and 2x caps
• 1x Marine Nitrate High Range Starter Kit (reagents for 10 tests)
• 1x 3 mL Pasteur pipette
• 1x 1.5V AAA alkaline battery
• 1x Instruction manual

Frequently Asked Questions

What nitrate range does the Hanna HI782 measure?
It measures from 0.0 to 75.0 ppm (as NO3-) at a resolution of 0.1 ppm. That makes it well suited to the higher nitrate levels often found in saltwater aquariums.

Can I use the HI782 in a freshwater aquarium?
The HI782 is designed for marine applications and saltwater aquariums. Its reagent is part of a marine nitrate high range kit.

How many tests does the included reagent cover?
The Marine Nitrate High Range Starter Kit in the box contains reagents for 10 tests.

How accurate is the HI782 Nitrate Checker?
Precision is ±2 ppm ±5% of reading at 25°C (77°F). It uses an LED at 525 nm and a silicon photocell to read the colour change, rather than relying on your eye.

Will high nitrite in my tank affect the result?
Yes, it may. Nitrite is listed as an interference for this test, so take it into account when interpreting readings.

What battery does it use, and will it drain if left on?
It runs on one 1.5V AAA battery, which is included. It switches itself off after 10 minutes of non-use to save battery life.

When can I expect delivery?

• Gauteng (Jhb/Pta) - 1-3 working days
• Nationwide (Cpt/Dbn+) - 2-5 working days
• Outlying Areas - 3-7 working days

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