Accurate pH Calibration: The pH meter calibration solution is a known and fixed pH level solution that is used for calibrating pH meters. It ensures accurate and reliable pH readings, allowing for precise measurements. Verification of pH Meter Accuracy: This calibration solution can also be used to check the accuracy of pH meters. By comparing the readings of the pH meter with the known pH level of the solution, you can that your pH meter is functioning properly. Important for Plant Growth: Regular use of the pH regulator is crucial to maintain the optimal pH level in your nutrient solution. An incorrect acidity level can hinder the absorption of nutrients by your plants, leading to poor growth. By calibrating your pH meter with this solution, you can provide the right environment for healthy plant development. Two-point Calibration: To achieve accurate pH readings, the pH meter requires a two-point calibration. Using this calibration solution, you can perform a proper calibration by using both a pH 7 buffer and a pH 4 buffer. This ensures precise and reliable pH measurements in testing conditions. Convenient and Efficient: With the pH meter calibration solution, you can easily and efficiently calibrate your pH meter. No complicated tools needed for the two-point calibration process, and you be to obtain accurate pH readings consistently. Part Name:pH Meter Calibration Solution Styles:4.01,6.86,9.18 Please check as much as possible to make sure the item is what you need. Tips:The product may be updated constantly ,Due To Different Batches, The Actual Product May Have Slight Differences Or Color Differences, Which Does Not Affect Use. Colour:As Shown Material:Plastic Package Contents: 3 * pH Meter Calibration Solution Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.