Milwaukee Instruments

Mi412 Low Range Phosphate Photometer - Milwaukee

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The Milwaukee MI412 Low Range Phosphate Photometer is very simple to use and will give you readings on a large, easy to read LCD screen. The MI412 gives super fast results with a very high level of accuracy with the ability to give reproducible readings.

  • Large LCD Display
  • Reliable, Repeatable results
  • Auto Off feature turns off after 10 minutes
  • Works with fresh or saltwater
  • 9v battery included


Replacement MI412 Reagents - Milwaukee MI512 Reagents for MI412 Low Range Phosphate Photometer


A good, reliable phosphate test kit should be accessible to any serious reefer. We have found the Milwaukee MI412 Phosphate checker to be one of the most reliable test kits to measure phosphates. Excess amounts of phosphates (PO4) can actually inhibit coral growth and coloration. The most notable addition of phosphates added in a reef tank will be from the food you feed, and their is media out there to remove phosphates from the water in the tank, like GFO. When running any type of phosphate removal media you should have a test kit to know that it is actually working and when to change out the media.


What's Included:

1x Mi412 Phosphate Photometer
100x Single packets of reagent
2x Glass curvettes
2x Curvette caps
1x 9v Battery
1x Scissors for reagents
1x Carry case
1x Cleaning kit


Phosphate Range
0.00 to 2.50 mg/l PO4 (mg/l = ppm)
Resolution Range 0.01 mg/l (mg/l = ppm)
Accuracy Range ±0.04 mg/l @1.00 mg/l (mg/l = ppm)
Method adaptation of Ascorbic Acid method
Light Source tungsten lamp
Light Detector silicon photocell and 610 nm narrow band interference filter
Environment 0 to 50°C / 32 to 122°F; max RH 100%
Battery Type 1 x 9V (included)
Auto-off after 10 minutes of non-use
Dimensions 192 x 104 x 52 mm
Weight 380 g


DEFAULT Owners Manual.pdf

More Information
UPC 810666000425
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Product Questions

What low ranges does this measure in ppm?
Question by: Join the Revolution on Mar 11, 2017, 7:22 PM
Hey there,
The Milwaukee tester will give results for a range from O to 2.5ppm, at a resolution down to .01ppm.

Have a great day!
Answer by: Zack on Mar 14, 2017, 2:53 PM