Checker pocket size photometer for nitrite LR, 0 to 999 ppb

•  0 to 999 ppb

The HI-767 Checker is a compact, accurate solution for measuring marine nitrite within saltwater aquariums. This digital tester has a single button for operation, providing a streamlined testing experience, and comes equipped with starter reagents to begin testing straight out of the box.

The HI-767 tester covers the low range of nitrite testing in marine and reef fish tanks, from 0 to 999 ppb (as NO–2-N). The Checker is powered by a single AAA battery for continual testing, with auto-shut-off to preserve the lifespan of the tester before battery replacement is required.

Why measure nitrite?

Nitrite is a standard part of the nitrogen cycle that occurs within all aquariums, where ammonia caused by waste and debris is broken down by bacteria through a biological filter. Any level of nitrite in your fish tank can be a risk to your fish, as this chemical can cause a condition known as ‘brown blood disease’. This disease is a result of nitrite binding with the haemoglobin in the bloodstream, reducing the amount of oxygen available to the fish and changing the colour of the blood.

Measuring nitrite in saltwater aquariums with a colorimeter tester is an ideal way to gain immediate insight into the condition of your water. A comprehensive range and reliable digital testing ensure nitrite can be measured accurately within your aquarium. As nitrite is not visible, careful monitoring is vital for preventing a build-up of this parameter.

How does the HI-767 work?

The HI-767 electronic aquarium tester for nitrite uses an adaptation of the EPA Diazotization method 354.1. The reaction between nitrite and the reagent causes a pink tint in the sample of water within the Checker, allowing the electronic tester to accurately determine the amount of nitrite within your aquarium.

The HI-767 includes a starter kit for reagents with 6 tests, so you can start testing the nitrite in your aquarium immediately out of the box.

Four steps to test

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

  2. Take your vial out and add your reagent

  3. Place your vial into your Checker

  4. Press the button and read the results

Checkers vs test strips

Test strips are often considered the most cost-effective option for measuring aquarium parameters. However, these strips rely on your own perception of the results of testing, which can lead to inaccurate dosing of your water. Electronic testers, like Hanna Checkers, provide clear readings on a digital screen, providing the information you need to make precise measurements and correctly dose your water the first time.

Features:

• Compact, handheld design
• Accurate from ±10 ppb ±4% of reading
• Covers a single parameter for high accuracy
• Uses a single AAA battery (included with Checker)
• Power-off functionality after 10 minutes of inactivity
• Timer included for timed reaction readings

Order Information:

The HI-767 Checker is supplied with 2 sample cuvettes with caps, a nitrite low-range reagent starter kit for 6 tests (6 powder reagent packets), a AAA battery, instructions and a quick start guide.

Order more reagents with code HI-767-25 for the HI-767.

Range		0 to 999 ppb as NO2--N
Resolution		1 ppb
Accuracy		±4% of reading ±10 ppb @ 25ºC
Light Source		LED @ 470 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. The reaction causes a pint tint in the sample
Ordering information		Supplied with sample cuvette and caps x 2; Marine Nitrite Reagents Starter Kit x 10 tests; 1.5V AAA Alkaline battery and instruction manual.
Reagents & Standards		HI-767-25 Marine Nitrite Low Range Reagents – 25 tests; HI-767-11 Marine Nitrite Low Range Certified Standard Kit

HI767-11 Details:

Hanna optional Checker Calibration Sets provide a simple solution to validating your Checker. Each high quality set of standards is manufactured in our state-of-the-art facility and comes supplied with a Certificate of Analysis. The certificate of Analysis provides the lot number, reference values and expiry date to provide traceability when certifying the Checker HC.

HI767-25 Details:

HI-767-25 Marine Nitrite Low Range Reagents - 25 tests

Tip for an accurate measurement

It is important that the sample does not contain any debris.

Whenever the cuvette is placed into the measurement cell, it must be dry outside and completely free of fingerprints, oil or dirt. Wipe it thoroughly with HI-731318 or a lint-free cloth prior to insertion.

Shaking the cuvette can generate bubbles, causing higher readings. To obtain accurate measurements, remove such bubbles by swirling or by gently tapping the cuvette.

Do not let the reacted sample stand for too long after reagent is added, or accuracy will be lost.

After the reading, it is important to discard the sample immediately, otherwise the glass might become permanently stained.