Milwaukee MI411 pH and Free & Total Chlorine PRO Photometer

SKU: 9139-MI411~ea

Milwaukee MI411 pH and Free & Total Chlorine PRO Photometer

SKU: 9139-MI411~ea
Regular price $395.46 CAD
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Milwaukee MI411 pH and Free & Total Chlorine PRO Photometer

Milwaukee MI411 PRO Photometer is designed for fast, reliable and repeatable results in a portable and easy to use unit. Ideal or use in aquaculture, water conditioning, commercial pool maintenance, and water quality analysis education. Low maintenance rugged housing is built to take knocks.

MI411 PRO has a microprocessor that delivers fast, repeatable results with accuracy of ±0.06 mg/L @ 1.50 mg/L (Cl) | pH +/- 0.1. MI411 has a built-in timer that ensures appropriate reaction time is used for the chemical reaction.  At the end of the timer, the meter will automatically take the reading ensuring consistency across multiple users.


  • Easy measurement: just mix the reagent in the sample, gently shake, insert the cuvette, zero the meter, and then press read
  • Zero-point calibration:  Simply insert the unreacted sample cuvette into the chamber, index the cuvette, and press the zero button.
  • Built-in error messaging display: ensures no mistakes are made in the testing process.  Messages include no cap, over range and under range, light source errors, and zero cal error.
  • Built-in indexing indent: allows for a lock and key fit with the cuvette cap. Ensures that the cuvette is indexed consistently (same position) in order to maintain the same path length for accurate results.
  • 9-volt battery included
  • Adaptation of the USEPA Method 330.5 and Standard Method 4500- CL G & adaptation of the phenol red method


Free and Total Chlorine Photometer, Range: 0.00 to 5.00 mg/L of Cl2
Free & Total Chlorine Resolution:

From 0.00 - 3.50 mg/L:  0.01 mg/L 

Above 3.50mg/L:     0.10 mg/L

Free & Total Chlorine Accuracy: 

Accuracy ± 0.06 mg/L @ 1.50 mg/L (Cl)

pH Resolution: 0.1 pH


pH Range: 6.5 to 8.0 pH
pH Accuracy: pH ± 0.1 @ 7.2 pH
Method: adaptation of USEPA method 330.5 & Standard Method 4500-Cl G (Cl) | pH adaptation of red phenol method
Light Source: Tungsten Lamp
Light Detector: Silicon photocell and 525 nm narrow band interference filter
Operating 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
Meter Dimensions / Weight:

7.5" x 4.1" x 2" / 0.84 lbs.

191 mm x 107 mm x 51 mm / 1.22 kg.

Packaging Dimensions / Weight:

12" x 11" x 4.5" / 2.7 lbs.

305 mm x 280 mm x 115 mm / 1.5 kg.

Glass Cuvettes:

MI0001 (2 x included)

Milwaukee MI411 Manual

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