| Measurement range | 0 to 500 ppb |
| resolution | 1 ppb |
| Accuracy | +/- 5 ppb +/- 5% of the reading |
| Light source | LED @525nm |
| Automatic shutdown | No operation after ten minutes |
| Measuring method | Refer to USEPA method 330.5, DPD method Refer to water and wastewater standard detection method 20th edition, 4500-CI method |
| basic configuration | Host, HI761-25 reagent, HI731313H Glass Colorimetric dish, English instruction manual and exquisite Chinese color comprehensive operation manual, HI721025 carrying case |
| optional reagents | HI761-25 |
| calibration group | HI761-11 |
Warranty days: 365 days
1. For product quality problems caused by non-human products of instruments and equipment, the manufacturer will provide free warranty services during the warranty period;
2. There is no warranty period for fragile and consumable parts, and if you find product quality problems after receiving the goods, please apply for return and exchange within 7 days, and you will not wait for the overdue ones;