Checker HC Handheld Colorimeter - Iron

Item #: HI721
Manufacturer: Hanna Instruments
from: $49.00 sale: $40.18
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Product Description

The new NDHI 721 Checker®HC portable handheld colorimeter features a resolution of 0.01 ppm (500 points) and ±0.04 ppm ±2% of reading accuracy. The NDHI 721 Checker®HC uses an adaptation of Standard Method 315 B.

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 NDHI 721 Checker®HC is extremely simple to use. First, zero the instrument with your water sample. Next, add the reagent. Last, place the vial into the  NDHI 721 Checker®HC, press the button and read the results. It’s that easy.


  • Easier to use and more accurate than chemical test kits
  • Dedicated to a single parameter
  • Small size, big convenience
  • Ideal for: Industrial, ground and treated waters, mining leachate monitoring and agricultural irrigation water


Range   0.00 to 5.00 ppm (mg/L)
Resolution   0.01 ppm (mg/L)
Accuracy @ 25°C   ±0.04 ppm ±2% of reading
Light Source   LED @ 525 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 three minutes of non-use and ten seconds after reading
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 Phenantroline method 315 B, for natural and treated waters.