The Milwaukee M10010 calibration solution is sold in a single-use 20ml sachet.
Warning: Last items in stock!
It will be used for the calibration of pH testers whose calibration point is 10.01 but also with devices that require a 2-point calibration.
To remain reliable:
a pH tester should be calibrated at least once a week.
the probe should be rinsed and cleaned after each use.
the electrode must be constantly hydrated when not in use.
the battery should be sufficient to avoid reading problems.