Simple, low-cost color disc method is the most accurate visual test kit method.
| Case Style | F |
| Method Name | Color disc/Ascorbic acid for clear samples |
| Method Number | Color disc/Ascorbic acid for clear samples |
| Model | PO-23 |
| Model | PO-23 |
| Number of tests | 100 |
| Parameter | Phosphate |
| Parameter | Phosphate, ortho-/meta- – As PO43- |
| Platform | Color Disc |
| Range | Dual Range |
| Range | 0.1 – 4 mg/L PO₄ |
| Range 2 | 1 – 40 mg/L PO₄ |
| Smallest Increment | 0.1 1 |
| Smallest Increment Steps | 1 |
| Standard Range | 0.1 – 4 mg/L PO₄; 1 – 40 mg/L PO₄ |
| What’s included? | Includes three reagents, color disc, comparator box, two viewing tubes, bottle, dropper tube, stove and cover, test tube clamp, deionized water, instructions and carrying case. |

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