Nitrite Low Range Checker
The HI-707 Nitrite Low Range Checker is a simple, accurate and a cost effective way to measure low ranges of nitrite. Designed as a more accurate alternative to chemical test kits, the HI-707 provides quick, accurate results in four easy steps.
The HI-707 uses an adaptation of EPA diazotisation method 354.1. The reaction between nitrite and the reagent causes a pink tint in the sample.
Features - 
Small palm-size design
Accurate from +-20pbb to +-5% of reading
Dedicated single parameter 
Uses 1 x AAA battery
Auto Power Off 10 minutes
Built-in timer for timed reaction readings 

The checker is supplied with 2 cuvettes and caps, reagent starter kit (6 tests), 1 x AAA battery and instruction manual. 

Spare reagents can be purchased, these come in packs of 25 and can be chosen in the drop down option on this listing.