Hanna Nitrate Test Kit

Hanna Instruments

Hanna Nitrate (LR) Low Range Checker HC (HI781)


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Hanna Nitrate (LR) Low Range Checker HC - HI781 Test Kit

HI781 Checker HC

Marine Nitrate (LR) Handheld Colorimeter

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 colour and paleness.

The HI781 Nitrate Checker HC is a handheld colorimeter that uses the Beer-Lambert principle to determine the concentration of nitrate colorimetrically. The HI781 is designed specifically to measure low levels of nitrate in a saltwater aquarium. The 0.00 to 5.00 range is ideal for reef aquarium maintenance.

•Ideal for aquariums and marine biology

•Easier to use and more accurate than chemical test kits

•Small size, big convenience


  • Range - 0.00 to 5.00 ppm (mg/L) NO₃-

  • Resolution - 0.01 ppm

  • Accuracy @ 25°C/77°F - ±0.25 ppm ±2% of reading

  • Light Source - LED @ 525 nm

  • Light Detector - silicon photocell

  • Method - zinc reduction method

  • Auto-off - after ten minutes of non-use

  • Environment - 0 to 50°C (32 to 122°F); RH max 95% non-condensing

  • Battery Type - (1) 1.5V AAA

 HI781 Checker HC is supplied with sample cuvettes with caps (2), nitrate reagent starter kit (reagents for 25 tests), filter holder, 10 mL syringe, 5 mL syringe with tip, mixing vial with cap, battery, and instructions.

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