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HI-764 Nitrite (Marine ULR) Handheld Colorimeter - Checker®HC

HI-764 Nitrite (Marine ULR) Handheld Colorimeter - Checker®HC

Hanna HI-764 Nitrite (Marine ULR) Handheld Colorimeter - Checker®HC

HI-764 Nitrite (Marine ULR) Handheld Colorimeter - Checker®HC

0 to 200 ppb
Ideal for salt water aquariums
In Stock
£58.00 (exc. VAT) £69.60 (inc. VAT)

The HI-764 Hanna Ultra Low Range Nitrite Checker is ideal for salt water aquariums and coral reef tanks.

With its fantastic ability to measure exceptionally low levels of nitrite, the HI-764 Nitrite Checker is great for aquarium maintenance.

Checker®HC is supplied with reagents for 6 tests. Use code HI-764-25 (25 tests) for future purchases.

HI-764 Nitrite (Marine ULR) Handheld Colorimeter - Checker®HC information

Hanna's extended description

Nitrites are an intermediate form of nitrogen produced when ammonia is converted into nitrate during the nitrogen cycle. As organic matter decays, it produces ammonia; the highly toxic ammonia is converted into nitrite by bacteria; and the nitrite is then converted into nitrate by another bacteria.

Nitrite is dangerous to aquatic life if it is allowed to build up, causing tissue damage that can lead to illness and death. By detecting even minute levels of nitrite, the Hanna Nitrite Checker can help aquarists to take action at the earliest possible moment and eliminate unnecessary suffering among the fish.

Ideal for:

  • Salt water aquariums
  • Coral reef tanks

Main Benefits:

  • Testing is quick and easy
  • High precision results - more accurate than chemical test kits
  • Auto shut-off feature means the Checker cannot be left on by mistake
  • Fully portable, fitting easily into both palm and pocket

Four steps. One click. Instant Readout.

1. ‘Zero’ the Checker®HC with your vial & 10ml water sample inside

2. Take the vial out and add your reagent

3. Place your vial into your Checker®HC

4. Press the button and read the results

Battery powered – Allows use away from a power source. Batteries are included with all battery operated products.

Use HI-764-25 Reagents for HI-764 Nitrite (Marine ULR) Handheld Colorimeter - Checker®HC x 25 tests.

Use HI-764-11 Calibration Check Set for HI-764 Nitrite (Marine ULR) Handheld Colorimeter - Checker®HC


Specifications list


Range 0 to 200 ppb
Resolution 1 ppb
Accuracy ±4% of reading ±10 ppb @ 25ºC
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 3 minutes of non-use
Dimensions 86 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.

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