Product Description
Milwaukee MI511-100 Free & Total Chlorine & pH Reagent Kit (100 Tests)Get complete pool and water quality chemistry in a single kit with the Milwaukee MI511-100 — 100 pre-made liquid reagent tests covering Free Chlorine, Total Chlorine, and pH, all formulated specifically for the Milwaukee MI411 Free & Total Chlorine & pH Photometer.Two proven colorimetric methods in one kit: the industry-standard DPD method for free and total chlorine measurement (0.00–5.00 ppm), and the trusted phenol red method for pH measurement (6.5–8.0) — giving you a complete water chemistry snapshot with a single reagent kit and a single instrument.Key Features
3-Parameter Coverage: Measures Free Chlorine, Total Chlorine, and pH — the three most critical pool and drinking water parameters in one kit
Dual Method: DPD colorimetric for chlorine (USEPA 330.5 / SM 4500-Cl G) + phenol red colorimetric for pH
Chlorine Range: 0.00 – 5.00 ppm (mg/L) free & total chlorine
pH Range: 6.5 – 8.0 pH units
100 Pre-Made Liquid Tests: Ready-to-use reagents — no preparation, no measuring errors
Expiration Date & Lot Number: Every test is marked for full traceability and quality assurance
MI411-Specific Formulation: Calibrated to the Milwaukee MI411’s optical system for maximum accuracy across all three parameters
Why This Kit?Pool water safety depends on the balance between chlorine disinfection and pH. Too little chlorine and pathogens survive; too much and swimmers experience irritation. pH outside the 7.2–7.8 range reduces chlorine effectiveness and causes equipment corrosion. The MI511-100 lets you monitor all three parameters with a single kit and the MI411 photometer — faster, simpler, and more cost-effective than buying separate reagent kits.How It Works
Free & Total Chlorine (DPD Method): DPD reagent reacts with chlorine to produce a pink-colored solution. Color intensity is proportional to chlorine concentration. The MI411 reads both free and total chlorine in ppm.
pH (Phenol Red Method): Phenol red indicator changes color across the pH 6.5–8.0 range. The MI411 measures the color photometrically and displays the pH value.
How to Use
Fill a clean cuvette with your water sample to the fill line
Add the appropriate MI511-100 reagent test for the parameter you’re measuring
Cap and gently mix until the reagent is fully dissolved
Wait for the color reaction to develop (per MI411 instructions)
Wipe the outside of the cuvette and insert into the MI411 photometer
Select the parameter (free Cl₂, total Cl₂, or pH) and read the result on the display
Compatible With
Photometer: Milwaukee MI411 Free & Total Chlorine & pH Photometer
Parameters: Free Chlorine, Total Chlorine, pH
Chlorine Range: 0.00 – 5.00 ppm (mg/L)
pH Range: 6.5 – 8.0
Methods: DPD (USEPA 330.5 / SM 4500-Cl G) + Phenol Red
Applications
Swimming pool and spa water chemistry monitoring
Drinking water treatment compliance testing
Recreational water facility management
Hotel and resort pool maintenance
Aquatics center water quality control
Laboratory water quality analysis
Specifications
Model: MI511-100
Brand: Milwaukee Instruments
Test Parameters: Free Chlorine, Total Chlorine, pH
Chlorine Method: DPD colorimetric (USEPA 330.5 / SM 4500-Cl G)
pH Method: Phenol red colorimetric
Chlorine Range: 0.00 – 5.00 ppm (mg/L)
pH Range: 6.5 – 8.0
Quantity: 100 liquid reagent tests
Compatible Meter: Milwaukee MI411 Photometer
MPN: MI511-100
UPC: 810666001011
Storage & HandlingStore in a cool, dry place away from direct sunlight and heat. Keep reagents sealed until ready to use. Do not use reagents that appear discolored or show signs of contamination. Always check the expiration date and lot number before use to ensure reagent integrity and measurement accuracy.Pair the MI511-100 with the Milwaukee MI411 Photometer and Milwaukee MI0001 Glass Cuvettes for a complete, professional pool and water quality testing solution.
