For calibration of Dissolved Oxygen Meter MW600.
Calibration at 0 % Oxygen is required at first fill of electrolyte in the probe, after refilling electrolyte, and after changing the probe's membrane.
Prepare a solution of 4 weightpercent Sodium Metabisulfite and 96 weightpercent distilled water.
The resulting solution is not stable and should be prepared shortly before usage.
Content: Sodium Metabisulfite (E223)
Weight: 25 grams
Produces approximately 500 ml solution.