Specification Sheet

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. Highly toxic ammonia is converted
into nitrite by bacteria, and the nitrite is converted
into nitrate by another bacteria. Nitrite is dangerous
to aquatic life if it builds up, causing tissue damage
that can lead to illness and death.
The
HANNA HI 764 Checker®HC bridges 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. The HANNA HI 764 Checker®HC
is accurate and affordable.
The HI 764 Checker®HC portable handheld
co
lorimeter features a resolution of 1 ppb and
uses an
adaptation
of EPA Diazotization method 354.1.
The contoured style of this 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.
The HI 764 Checker®HC is extremely simple to use.
First, zero the instrument with your water sample.
Next, add the reagent. Last, place the
vial i
nto the HI
764 Checker®HC, press the button and read the
results. It’s that easy.
Easier to use and more accurate than chemical
test kits
Adaptation of EPA Diazotization method
Accuracy ±10 ppb ±4% of reading
1 ppb resolution (200 points)
Large, easy to read digits
Auto shut-off
Dedicated to a single parameter
Designed to work with HANNA’s powder reagents
Uses 10 mL glass cuvettes
Small Size, Big Conve
nience
We
ighing a mere 64 g (2.25 oz.), the Checker®HC
easily fits into the palm of your hand or pocket
Use for quick and accurate on the spot analysis
Single button operation: Zero and Measure
Operated by a single AAA battery
ACCURATE AND AFFORDABLE NITRITE ULR MEASUREMENT
SHOWN ACTUAL SIZE