HI7021L Redox potential test solution is designed to measure the performance of ORP electrodes. When placing the ORP electrode in this test solution, the reading value should be within the ±20 mV range of 240 mV @ 25°C. This solution allows the user to quickly check if the electrodes are working properly and can be used as a diagnostic tool to determine if the electrodes need to be cleaned and conditioned. HI7021L are manufactured with reagent-grade chemicals and in a temperature-controlled environment, and the bottles are labeled with product code, lot number, and expiration date, and are equipped with tamper-evident seals to ensure the quality and freshness of the solution.
| 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 |