The PH and temperature probe for PH55-PH56 (ref. Mi56P), is an electrode that is used as a replacement when your PH55 or PH56 meter does not work properly, for which the cleaning and storage tips have not improved the condition of your probe. PH and temperature for PH55-PH56.
To install your PH and temperature probe for PH55-PH56, remove the cap from the PH55 / 56 meter, unscrew the protective ring, remove the PH and temperature probe for PH55-PH56 and insert the new electrode in its place. Screw the ring back on.
After changing the PH and temperature probe for PH55-PH56, you will have to recalibrate your PH55 / 56 meter