Free & Total Chlorine PRO Photometers

The Milwaukee MI404 PRO Photometer delivers fast, lab-grade free and total chlorine measurement in a rugged, portable design suited for pools, brewing, winemaking, hydroponics, and educational applications. The MI404 features a built-in microprocessor for repeatable results, simple zero-point calibration, and an indexed cuvette chamber that ensures consistent positioning and path length across every test. Error messaging and a built-in reaction timer further reduce the chance of user error, making the MI404 reliable in the hands of professionals and students alike.

Features:

• Measures free and total chlorine; range 0.00-5.00 mg/L (Cl2); accuracy ±0.06 mg/L at 1.50 mg/L
• Resolution of 0.01 mg/L (0.00-3.50 mg/L) and 0.1 mg/L (above 3.50 mg/L)
• Adaptation of USEPA Method 330.5 and Standard Method 4500-CL G
• Built-in timer ensures proper reagent reaction time before automatically taking the reading for consistent, repeatable results
• Indexed cuvette chamber with lock-and-key cuvette cap fit ensures consistent positioning and path length for accurate readings
• Built-in error messaging alerts for no cap, over/under range, light source errors, and zero calibration errors
• Simple zero-point calibration — insert unreacted sample cuvette, index, and press zero
• Large digital LCD readout for fast, easy-to-read results
• Lightweight and portable with a rugged design built to withstand daily use
• Auto shut-off after 10 minutes of non-use (battery included)
• Replacement reagents available: MI504-100 (100 tests)