Fluid contamination measurement procedure records selectively filtered transmitted and scatter light in visible, UV and IR regions as function of contamination level

摘要

A fluid (8) contamination measurement procedure records selectively filtered transmitted (11) or scattered (13) light (5), ultraviolet (6) or infrared (7) emitting diode emissions to compare their difference, sum and quotient as a function of contamination level. Independent claims are included for equipment using the procedure.