The concentration of the M6432 and many of the other KYZEN METALNOX chemistries is best measured using conductivity. The other common methods of testing a wash bath titration and refractometer, can be skewed by the soils in the bath and not recommended. The chemistry concentration is controlled through manual additions or a chemistry dosing pump activated by the wash tank water feed or when tied into an electronic conductivity meter with a signal output to trigger the pump.