Essential 250ml pH 4,01 calibration solution

Essentials pH buffers - used to determine the accuracy of pH meters used to measure the pH of the nutrient solution.

pH Essentials Buffer 4 and 7 are used to calibrate meters. Without calibration, the accuracy of the pH values reported by the instrument will be unreliable. This can lead to serious crop losses, and if this condition persists, plant damage can occur.

Essentials buffers use two values - 4 and 7 pH - to calibrate your pH testers, as they operate at the edge of the pH range where you work for hydroponics, ie 5.5-6.5. When used for hydroponics, it is not necessary to calibrate the pH testers to another value, as you only work in a small section of the pH scale.

When calibrating, it is advisable to use only a small sample of the solution in a separate container, check the meter and then pour out the solution. Spilling the used solution will prevent possible contamination of the fresh solution and ensure a longer life of the calibration solution.