Easier to use and more accurate than chemical test kits.
Phenanthroline method Accuracy ±0.04 ppm (mg/L) ±2% of reading 0.01 ppm (mg/L) resolution (250 points)Large, easy to read digits Auto shut-off.
Accurate and affordable Iron measurement.
About 6.3% of the earths crust is made of iron, of which 43% is in soils. The analysis of iron is often performed to monitor ground water and irrigation waters as a gauge of corrosion from industrial settling, and as an indication of the effectiveness of treatment from mining leachate. The HANNA HI 721 Checker®HC bridges the gap between simple chemical test kits and professional instrumentation. Chemical test kits are not very accurate and only give 5 to 10 points resolution while professional instrumentation can cost hundreds of dollars and can be time consuming to calibrate and maintain. The HANNA HI 721 Checker®HC is accurate and affordable with immediate results. The new HI 721 Checker®HC portable handheld colorimeter features a resolution of 0.01 ppm (250 points) and 2% ±0.04 ppm accuracy of reading. The HI 721 Checker®HC uses an adaptation of Standard Method 3500-Fe 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 HI 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 HI 721 Checker®HC, press the button and read the results. It’s that easy.
Small Size, Big Convenience
Weighing a mere 65g (2.3 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.
Range 0.00 to 5.00 ppm (mg/L)
Resolution 0.01 ppm (mg/L)
Precision 2% of reading ±0.04 ppm (mg/L) @ 25°C
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 2 minutes of non-use and after read
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 Standard Method 3500-Fe B.
For reagents click here.