Hanna Instruments HI97771 Hanna HI97771 free + total chlorine ultra-high-range photometer, 0-500 mg/L. Cooling-tower + industrial disinfection.
| Model | HI97771 |
| Method | DPD UHR |
| Range | 0-500 mg/L Cl2 |
| Accuracy | ±3% |
| Calibration | 2- or 3-point + auto-recognition |
| Sample volume | 10 mL (photometer) / probe-immersion (meter) |
| MOQ | 1 |
Standard Hanna HI reagents (matching checker code).