PH‑803W PH ORP Controller Acidity Alkalinity Controller Water Quality Monitoring ToolAU Plug 220-240V Item Type: PH ORP Controller Material: ABS Model: PH-803W Function: measure ORP value/PH value of water quality Measuring Range: ORP: -1999~1999mV; PH: 0.00~14.00PH Accuracy: ORP: ±5mV; PH: 0.05PH Resolution: ORP: 1mV; PH: 0.01PH Setting Control Range: ORP: -1999~1999mV; PH: 0.00~19.99PH Operating Environment Temperature: 0-50℃, humidity<95℅ Display: 4-digit LCD display Scope of Application: suitable for places that need water quality monitoring, such as fish hatching, wine production, swimming pools (bathrooms), laboratories, water quality management, middle schools and universities, floral analysis fluid (PH value), pond, various industries, etc. How e: 2. Connect the PH and ORP electrodes respectively. 3. Remove the protective cover. (Do not touch the electrode bulb with your hands to avoid contamination. The glass bulb is fragile and avoid damage by knocking.) 4. After cleaning the electrode with distilled water or alcohol, wipe off the water on the plastic shell and shake off the small water droplets on the electrode to avoid influence Test results. 5. Insert the electrode into the measured solution, so that the measuring electrode is immersed in the measured solution. 6. Gently shake the electrode to make the small bubbles on the electrode leave the electrode, and read the stable display number when the value is stable. 7. After use, unplug the power supply, clean the electrode with clean water, and put on a protective cover. 8. For long-term use, the instrument and electrodes must be fixed.