Nitrite Ultra Low Range Colorimeter HI764 Hanna Checker - Marine Water

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  • Hanna Checker HC Colorimeter HI764 Nitrite Ultra Low Range - Marine Water

Nitrite Ultra Low Range Colorimeter HI764 Hanna Checker - Marine Water

67% Recommend this to a friend (4 of 6)

SKU: 208639
In Stock: 34
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Quick Overview

Check for Nitrite easily in your tank. The Hanna HI764 Checker HC Handheld Colorimeter for Nitrite ULR bridges the gap between simple chemical test kits and professional instrumentation. Accurate, affordable and easy to use. First, zero the instrument with your water sample. Next, add the reagent. Last, place the vial into the Hanna Nitrite Checker, press the button and read the results. Done.

Full Details

HI764 Nitrite Ultra Low Range Colorimeter Manufacturer's Manual

Hanna Checker Nitrate ULR Manufacturer's Literature


  • Easier to use and more accurate than chemical test kits
  • Large, easy to read digits Auto shut-off
  • Dedicated to a single parameter
  • Designed to work with HANNA's powder reagents
  • Uses 10 mL glass cuvettes
  • Small Size, Big Convenience
  • Fits in the palm of your hand


  • Range: 0 to 200 ppb
  • Resolution: 1 ppb
  • Accuracy: ±10 ppb ±4% of reading at 25°C
  • Light Source: LED @ 525 nm
  • Light Detector: Silicon photocell
  • Environment: 0 to 50°C (32 to 122°F); RH max 95% non-condensing
  • Battery Type: (1) 1.5V AAA
  • Auto-off: After 2 minutes of non-use
  • Dimensions: 81.5 x 61 x 37.5 mm (3.2 x 2.4 x 1.5")
  • Weight: 64 g (2.25 oz.)
  • Method: Adaptation of EPA Diazotization method 354.1


6 Items

  • Excellent product By Sparky on 5/3/2017

    once you get the hang of getting the reagent in the vial you will experience a very accurate test. I cut it along two sides, open the packet up like a clam and form a channel on one of the lips and pour in while lightly tapping on the back of the packet.
  • Easy to use By Luis on 7/9/2016

    Easy to use which help to be consistent in taking parameters test
  • Powder very difficult to add By Jordi on 10/28/2015

    I like the accuracy and the convenience of this device. I just find it very difficult and annoying to add the powder into the glass container.. I hope they develop a liquid reagent.

    Also, don't forget the phosphorus is different than phosphate, you need to convert your result into phosphate. But the resolution is better than the phosphate version of this device and more reliable.
  • Issues By DH on 4/15/2015

    Two meters, neither one had a timer that would work.
  • Unnecessary By BobG on 3/22/2015

    Bought this thinking it was a Nitrate test (My Bad). My Nitrites are virtually zero as you would expect in a 7-year old tank. I was looking for something to test Nitrate to gauge my water change frequency since the color change tests seem too difficult to discern the shade.
  • Good but has issues By Jb on 2/23/2015

    The other Hanna checker I bought works great, but this one is somewhat defective. If you touch it wrong or try to close the lid, it shuts off and goes blank. It took me 30 minutes of messing with it to get to initially turn on. I just can't close the lid or touch it while waiting for the reading.


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Product Questions

Do you sell a Hanna checker for nitrate? Or is the nitrite ulr the same thing?
Question by: Larry Ross Smith on Jan 13, 2016 2:19:00 PM
Great question!
We do not have a Hanna Checker for Nitrate unfortunately. The Nitrite will test a previous step in the nitrogen cycle process. Feel free to let us know if you have any further questions!
Answer by: Connor (Admin) on Jan 13, 2016 2:31:00 PM
what should the number be for this unit for a safe level
mine says 13 is that safe
Thanks Rich
Question by: Richard on Apr 18, 2016 3:24:00 AM
Great question!
The number should be below 30 PPB. This will be measured in PPB and at 13ppb the levels will well in range below the 30 which is the maximum amount in the tank
Answer by: Connor (Admin) on Apr 25, 2016 6:34:00 PM
what is the range of this in ppm? thanks
Question by: Robert on Feb 2, 2015 3:56:00 AM
Great Question Robert! This checker has a range of 0 to 200ppb/0.2ppm
Answer by: Bulk Reef Supply on Feb 2, 2015 3:56:00 AM