You can make 2 calibrations of the pH probe and 2 calibrations of the ORP probe.

The sachets of products are for single use.

Do not keep part of the product for another calibration as it will have deteriorated and will not calibrate the probe correctly.

Click here if you want to know the procedure for the calibration of the probe.

If you still have doubts about this topic, don't hesitate to contact us.