Calibration kit Ondilo ICO digital tester

To always take accurate measurements with a digital tester, the probes should be calibrated or calibrated at the start of the new season. You do this very easily with this official calibration kit of the Ondilo ICO digital water tester. 

This calibration kit contains the liquids pH4, pH7 and 470mV. In addition, you also get a handy holder that makes the process that little bit smoother or faster.