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The Mi411 is a portable photometer that’s perfect for pool maintenance, aquaculture applications, and rapid water testing. It’s equally well‑suited for educators who want their students to master the fundamentals of water‑quality analysis and apply them in real‑world settings.
The Mi411 is a handheld photometer for pH, free chlorine and total chlorine testing, offering:
• Quick, clear readings on a large LCD display
• Resolution: ± 0.06 mg/L at 1.50 mg/L for chlorine; ± 0.1 pH at pH 7.2
• Measuring ranges: 0.00 – 5.00 mg/L for Cl₂ and pH 6.5 – 8.0
• Lightweight, portable design
• Auto‑shut‑off after 10 minutes of inactivity; 9‑volt battery included
The Mi411 comes in a rugged carrying case with two sample cuvettes, reagents*, a lint‑free wiping cloth and an instruction manual.
*Reagents: one 30 mL pH reagent bottle, plus 100 powder pillows for free chlorine and 100 powder pillows for total chlorine.
Free & Total Chlorine:
| Range | 0.00 to 5.00 mg/L Cl2 | |
| Resolution | 0.01 mg/L (0.00-3.50 mg/L) 0.10 mg/L (above 3.50 mg/L) |
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| Precision | ±0.06 mg/L @ 1.50 mg/L | |
| Method | Adaptation of the USEPA method 330.5 Standard Method 4500-Cl G |
pH:
| Range | 6.5 to 8.0 pH | |
| Resolution | 0.1 pH | |
| Precision | ±0.1 pH @ 7.2 pH | |
| Method | Adaptation of the phenol red method. |
Other
| Light Source | Tungsten lamp | |
| Light Detector | Silicon Photocell and 525 nm narrow band interference filter | |
| Environment | 0to 50 °C (32 to 122 °F), 100% RH max | |
| Battery Type | 9 volt (1 pc) | |
| Auto-Shut off | After 10 minutes of non-use | |
| Dimensions | 192 x 104 x 52 mm | |
| Weight | 380 g |
