HI97742 Iron LR and manganese photometer: Range Iron: 0.00 to 1.60 mg/L, Manganese: 0 to 300 μg/L

Iron is naturally present in water in low concentrations, but it reaches high concentrations in wastewater effluents. The iron concentration in water needs to be monitored because it becomes harmful above certain levels. In domestic water, for instance, iron can unpleasantly alter the taste, stain laundry, damage kitchenware and favor the growth of certain bacteria. Iron is also an indicator of ongoing corrosion in water-cooling and heating systems. Moreover, iron is normally monitored in mining wastewater to avoid contamination. Manganese is one of the most common metals present in nature and is used in many industrial applications, for example, the production of fertilizers and in the pharmaceutical industry. Manganese salts are also used in iron alloys (steel manufacturing) and non-iron alloys as it improves their corrosion resistance and hardness. Manganese, in high concentrations, can produce corrosion and scaling in pipes, which is a serious industrial concern.

The HI97742 offers multiple methods within one meter. Iron determination uses an adaptation of the TPTZ method and manganese determination uses an adaptation of the 1-(2-pyridylazo)-2-naphthol PAN method. The reagents are in powder and liquid form depending on the parameter being tested.

When the appropriate reagent is added to the sample, it will display a color change; the greater the concentration, the deeper the color. The associated color change is then colorimetrically analyzed according to the Beer-Lambert Law. This principle states that light is absorbed by a complementary color, and the emitted radiation is dependent upon concentration. For determination of low range iron and manganese, a narrow band interference filter at 525 nm allows only green light to be detected by the silicon photodetector and omits all other visible light emitted from the LED. As the change in color of the reacted sample increases, absorbance of the specific wavelength of light also increases, while transmittance decreases.

The HI97742 has an innovative optical system that offers superior performance in accuracy, repeatability, and the short amount of time it takes to perform a measurement. This compact, waterproof meter is extremely user friendly with a tutorial mode that walks the user graphically, step by step, in performing a measurement. The use of a backlit dot matrix LCD allows the use of virtual keys which makes the operation of the meter very intuitive including selecting different units of measure, reviewing GLP data, recalling the last 50 measurements, and customizing the meter to user preferences.

HI97742 is completely waterproof including the cuvette holder that is designed with ridges to protect the optical path from getting scratched by the cuvette and a gasketed battery compartment that holds three common AA batteries. The compact design fits comfortably in the hand for use in the field or on a table for benchtop use. The LCD is backlit for easy viewing under all conditions.

 

• LED that generates very little heat

• 8 nm narrowband interference filter that is accurate to +/- 1 nm.

• Reference detector that modulates the voltage to LED for consistent light output. 

• A concave focusing lens that reduces errors from imperfections in the cuvette.

On-Screen Features

CAL Check
Advanced features including CAL-Check to verify performance and if necessary, recalibrate.

Setup Options
Setup options for meter personalization include date and time format, language, and enabling the tutorial mode.

Multiple Chemcial Forms
Display hardenss results in choice of chemcial forms.

Tutorial Mode
Tutorial mode for step-by-step instructions to guide a first-time user in how to perform a measurement correctly.

Reaction Timer
Built-in reaction timer that ensures consistency amongst multiple users.