Hach IR-21 low-range iron test kit. Ranges 0-0.2 and 0-1.2 mg/L Fe by the TPTZ method, read on a color comparator box with two color discs. Hach catalog 2299300.
| Part | IR-21 |
| Hach catalog | 2299300 |
| Parameter | Iron (low range) |
| Range | 0-0.2 and 0-1.2 mg/L Fe |
| Method | TPTZ color disc comparator |
| Tests per kit | 100 (typical) |
| MOQ | 1 |