Iron Test Meters for Water Quality

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Measure dissolved and total iron in bore water, drinking water and process water with Milwaukee Instruments photometers. Both meters read 0.00-5.00 ppm Fe using the USEPA phenanthroline method – choose the portable MW14 for routine field checks, or the Mi408 PRO kit for laboratory and compliance work. Full selection guide below.

Measure dissolved and total iron in bore water, drinking water and process water...

What an iron test meter measures

Iron in water occurs in two forms: ferrous iron (Fe2+), which is dissolved and leaves water clear until it oxidises, and ferric iron (Fe3+), which is already oxidised and shows as the familiar red-brown staining. A photometer measures total iron by adding a phenanthroline reagent that develops an orange colour in proportion to concentration, then reading that colour optically. The result is a numeric ppm value rather than a colour-card comparison, which is what makes it defensible for compliance reporting.

Testing iron in bore water

Iron is the most common complaint in Australian bore and groundwater supplies. It causes orange staining on fixtures and laundry, a metallic taste, and it feeds iron bacteria that form slime in pipework and pumps. The Australian Drinking Water Guidelines set an aesthetic value of 0.3 mg/L for iron – well within the 0.00-5.00 ppm range both meters cover. If you are commissioning a bore, sizing a filtration system, or checking whether treatment is still working, a photometer gives you a number you can track over time. Iron is rarely the only parameter worth checking on a bore — most programmes pair it with pH meters, TDS meters and turbidity meters to build a complete picture of the supply.

Choosing between the MW14 and the Mi408 PRO

Both meters cover the same 0.00-5.00 mg/L iron range at 0.01 mg/L resolution, so the choice is about how the result will be used rather than what it can measure. The MW14 is a single-parameter handheld photometer for routine iron checks in the field – compact, battery powered, and priced for teams that need a reliable number quickly. The Mi408 PRO is the instrument to specify when the reading has to stand up in a report: it follows an adaptation of USEPA Method 315 and Standard Methods 3500-Fe B, publishes its optical train (tungsten lamp with a 525 nm narrow-band interference filter), accepts either reagent packets or liquid bottles, and ships as a complete kit with two cuvettes, reagents, a hard carrying case and wiping tissue.

Reagents and consumables

Both instruments are colorimetric and consume reagent with every test. Replacement iron reagent is available separately so testing never stops mid-programme.

Frequently Asked Questions

How do I test for iron in water?

Add a phenanthroline reagent to a water sample and read the resulting colour with a photometer. The reagent reacts with iron to produce an orange tint whose intensity is proportional to concentration, and the meter converts that to a ppm reading. Both meters on this page use this method across a 0.00-5.00 ppm range.

What is an acceptable level of iron in drinking water?

The Australian Drinking Water Guidelines set an aesthetic guideline value of 0.3 mg/L for iron. Above that, staining, taste and odour complaints become likely, even though there is no health-based limit at typical concentrations.

Do these meters test iron in blood or check iron levels in the body?

No. These are water-quality instruments for bore, drinking, process and aquaculture water. They cannot be used for ferritin, serum iron or any medical testing - for that, speak to a pharmacy or pathology provider.

What is the difference between ferrous and ferric iron, and which do these meters read?

Ferrous iron (Fe2+) is dissolved and leaves water looking clear; ferric iron (Fe3+) is oxidised and causes visible red-brown staining. The phenanthroline method reads total iron, covering both forms once the sample is properly prepared.

Can I use an iron photometer to check bore water?

Yes. Bore and groundwater are the most common applications for iron testing in Australia, where iron causes staining, metallic taste and iron-bacteria growth in pipework. A photometer lets you baseline a new bore and then verify that filtration or treatment is still performing.

Do I need to buy reagents separately

The Mi408 PRO is supplied as a kit including reagents to get started. Both instruments consume reagent per test, so replacement iron reagent is available separately for ongoing testing programmes.