Lotus Clean Calibration Fluid

For the calibration of your Digital pH Tester.

Note:
The calibration liquid can only be used once. It has a pH value of 7.0 in the closed packaging. After opening, the liquid can absorb carbon dioxide from the air, which can gradually change the pH value.

However, you can take water from the cold water pipe after calibration and measure the pH value there. This pH value is largely constant. You can use it as a reference value and use this water to determine whether you need to recalibrate. In addition, you should always keep the probe of the pH tester wet and close the cap over the wet probe. If you observe this, calibration of the pH tester will probably only be necessary every two to three months.