About 6.3% of the earth's 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 setting,and as an indication of the effectiveness of treatment from mining leachate.Chemical test kits are not very accurate and only give 5 to 10points resolution while professional instrumentation can costs hundred of dollars and can be time consuming to calibrate and maintain.
Range:0.00 to 5.00 ppm(mg/L)
Accuracy: + - 0.04ppm + - 2% of reading
Light Source: LED @ 525nm
Light Detector:Silicon photocell
Enviroment: 0 to 50deg.C(32 to 122 deg.F); RH max 95% non-condensing.