Nitrite Pocket Checker

About this product

The Nitrite Pocket Checker is a simple, accurate and cost-effective way of measuring nitrite levels in water. It comes in two models: the HI-707 Low Range Checker (0-999ppb), and the HI-708 High Range Checker (0-150ppm). Designed as a quicker and more accurate alternative to chemical test-kits, they require just four easy steps: 

Step one: Add a sample to one of the supplied cuvettes
Step two: Insert the sample into the checker and ‘zero it out’
Step three: Remove sample and add reagent.
Step four: Reinsert the sample and click the button to measure your results, or press and hold the button for three seconds for a time reaction reading.

The HI-707 uses an adaptation of the EPA diazotization method where the reaction between the nitrite and reagent creates a pink tint in the sample. 

The HI-708 uses an adaptation of the Ferrous Sulfate method, where the reaction between nitrite and reagent creates a greenish/brown tint in the sample.

Features:
* Small palm-sized design
* Dedicated to a single parameter
* Uses a single AAA battery
* Auto power off after 10 minutes of inactivity
* Built-in timer for timed reaction readings

Supplied with:
* 2 x cuvettes and caps
* Reagent starter kit (6 packets of reagent)
* 1 x 1.5V AAA battery
* Instruction manual

 

Specification

Low Range (HI-707) Specifications:
* Range: 0 to 600ppb NO₂ -N
* Resolution: 1ppb
* Accuracy (@25°C/77°F): ± 20ppb ± 5% of reading
* Measurement method: Colorimetric
* Light Source: Photodiode @ 470nm
* Light Detector: Silicon photocell
* Method: Adaptation of EPA diazotization method 354.1. The reaction between nitrite and the reagent causes a pink tint in the sample.
* Power supply: 1 x 1.5V AAA battery (included)
* Power auto off: After 10 min. of inactivity
* Environment: 0 to 50°C (32 to 122°F); RH max 95% non-condensing
* Dimensions: 81.5 x 61 x 37.5mm (3.2 x 2.4 x 1.5”)
* Weight: 64g (2.25oz.)

High Range (HI-708) Specifications:
* Range: 0 to 150ppm
* Resolution: 1ppm
* Accuracy (@25°C/77°F): ±3ppm ± 5% of reading
* Measurement method: Colorimetric
* Light Source: Photodiode @ 575nm
* Light Detector: Silicon photocell
* Method: Adaptation of the Ferrous Sulfate method. The reaction between nitrite and the reagent causes a greenish/brown tint in the sample.
* Power supply: 1 x 1.5V AAA (included)
* Power auto off: After 10 min. of inactivity
* Environment: 0 to 50°C (32 to 122°F); RH max 95% non-condensing
* Dimensions: 81.5 x 61 x 37.5mm (3.2 x 2.4 x 1.5”); Weight 64g (2.25 oz.)