Hanna Nitrate Low Range Checker HI781 - Marine
Hanna Nitrate Low Range Checker HI781 - Marine
Hanna Nitrate Low Range Checker HI781 - Marine
Hanna Instruments

Hanna Nitrate Low Range Checker HI781 - Marine

  • SKU: HI781
  • Availability: 0 In Stock

    The HI781 Marine Nitrate Low Range Colorimeter is a simple, accurate, and cost-effective way to measure nitrate from 0.00 to 5.00 ppm (as NO3–) in your saltwater aquarium. For samples containing 5.0 to 50.0 ppm nitrate, follow the approved dilution procedure.. With a digital read out, there is no more struggling to determine colors visually.

    Nitrate is a by-product of the Nitrogen cycle. Excessive amounts of nitrates in a reef aquarium can promote the growth of undesirable organisms including algae and dinoflagellates while insufficient amounts can lead to starvation in which SPS and other corals will show signs including the loss of color and paleness.


    • For use with saltwater samples
    • More accurate than chemical test kits
    • Dedicated to a single parameter
    • Small size, big convenience
    • No errors with a digital readout
    • Ideal for aquariums and marine biology applications


    • Range: 0.00 to 5.00 ppm (as NO3–) | 0.0 to 50.0 ppm (calculated) using dilution
    • Resolution: 0.01 ppm
    • Accuracy: ±0.25 ppm ±2% of reading @ 25 °C (77 °F) | ±2.5 ppm ± 5% of calculated reading using dilution
    • Light Source: LED @ 525 nm
    • Light Detector: Silicon photocell
    • Method: Colorimetric method. The reaction between nitrate and the reagent causes a pink/violet tint in the sample. This checker has been developed to work with seawater samples.
    • Battery Type: (1) 1.5V AAA
    • Auto-off: After 10 minutes of non-use
    • Environment: 0 to 50°C (32 to 122°F); RH max 95% non-condensing
    • Dimensions: 86.0 x 61.0 x 37.5 mm (3.4 x 2.4 x 1.5”)
    • Weight: 64 g (2.3 oz)

    Need More Reagent? Click Here: HI781-25 Nitrate Low Range Checker Reagents (25 Tests)

    Instruction Manual: Click Here