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Product code: HI781
Brand: HANNA INSTRUMENTS
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HI781 NITRATES TEST – Low Range Checker for Marine Aquariums
The HI781 Nitrates Test by Hanna Instruments is a high-precision, handheld Checker for low nitrate levels in marine aquariums, offering professional-level accuracy in a compact and affordable format. Unlike traditional test kits relying on visual color matching, the HI781 uses a 525 nm LED light source and a silicon photocell detector to ensure repeatable and objective measurements.
With a measurement range of 0.00 to 5.00 ppm (NO₃⁻) and a resolution of 0.01 ppm, it is ideal for reef systems where even slight excesses of nitrate can impact coral health and encourage nuisance algae growth.
Technical features:
Range: 0.00 to 5.00 ppm of nitrate (NO₃⁻)
Resolution: 0.01 ppm
Accuracy: ±0.25 ppm ±2% of reading at 25°C
Colorimetric method producing pink/purple hue
Light source: LED at 525 nm
Detector: Silicon photocell
Power: 1 x 1.5V AAA battery
Auto shut-off: after 10 minutes of inactivity
Dimensions: 86 x 61 x 37.5 mm
Weight: 64 g
Included in the box:
HI781 Checker
2 sample cuvettes with caps
Reagents for 25 tests
5 mL and 10 mL syringes
Filter holder
Mixing vial with cap
1.5V AAA battery
Instruction manual
Note: The presence of nitrites or copper may interfere with readings.
Why choose the HI781 Nitrate Checker:
Accurate and repeatable low-range nitrate testing
Professional-level results in a pocket-sized device
Specially designed for saltwater environments
Essential for maintaining nutrient balance in reef aquariums
One-button operation for ease of use
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