Calibration Solutions for pH Meter 3×250ml pH 4.0, pH 6.86, pH 9.18

These calibration powders are suitable for all pH measuring devices that can be calibrated with the specified pH values.

Includes: pH 4.00 buffer powder * 1 pc + pH 6.86 buffer powder * 1 pc + pH 9.18 buffer powder * 1 pc.

Using the buffer powder, you can easily prepare the calibration solution for pH measurement. Add the calibration powder to 250 ml of distilled water at 25 °C to obtain the correct buffer solution. Stir well until the powder is fully dissolved. Use the entire packet when adding the powder to the water. Use only distilled water.

Use the prepared solution to calibrate your pH meter according to the device instructions.