HANNA Brand Acidity Buffers are specially formulated with a unique tamper-evident sealing setting to ensure the quality and freshness of the acidity standards, in an unopened state, and with an expiration date of up to 5 years
| Redox potential calibration solution (ORP) bottle | ||
| Model | Calibration value (25°C) / application | Capacity (bottle) |
| HI7021L | 240mV | 500mL |
| HI7022L | 470mV | 500mL |
| HI7091L | Reduction pre-treatment solution | 500mL |
| HI7092L | Oxidation pre-treatment solution | 500mL |