Single Parameter Check – Nitrite
Nitrite Low Range, High Range and Marine Nitrite Ultra Low Range
- Handheld Colorimeters
- Easier to use and more accurate than chemical test kits
- Dedicated to a single parameter
- Small size, big convenience
- Water quality
Nitrification is the biological oxidation of ammonia (ammonium ion) into nitrite, followed by the oxidation of nitrite to nitrate. The first step of this two-step process is carried out in an aquarium by nitrifying bacteria. During this quick process, the ammonium levels drop while the nitrite levels increase. Since nitrite is just as harmful as ammonia, nitrite levels should be maintained at immeasurable levels. A mature biological filter should be able to keep nitrite levels low.
The HI707, HI708 and HI764 Checker®HC Handheld Colorimeters bridge the gap between simple chemical test kits and professional instrumentation. Chemical test kits are not very accurate, while professional instrumentation can cost hundreds of dollars and can be time-consuming to calibrate and maintain. Hanna Checker®HC’s are accurate, affordable and easy to use.
To begin measurements, first zero the instrument with your water sample. Next, add the reagent. Last, place the vial into the Checker®HC, press and hold the button for 3 seconds to start reaction timer. reading will be taken automatically and the results displayed. It’s that easy.
The contoured style of the Checker®HC fits in your palm and pocket perfectly and the large LCD is easy to read. The auto shut-off feature assures the battery life will not be drained if you forget to turn it off.
|Image||Name||Price Inc VAT||Buy|
|HI764 (Marine ULR)||HI707 (LR)||HI708 (HR)|
|Range||0 to 200 ppb NO2-—N||0 to 600 ppb NO2-||0 to 150 ppm NO2-|
|Resolution||1 ppb||1 ppb||1 ppm|
|Accuracy @ 25°C/77°F||±10 ppb ±4% of reading||±20 ppb ±5% of reading||±3 ppm ±5% of reading|
|Light Source||LED @ 525 nm||LED @ 470 nm||LED @ 575 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 two minutes of non-use||after ten 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 the EPA Diazotization method 354.1||adaptation of the Ferrous