Fluid moisture indicator

Claim 1

IN A FLUID MOISTURE INDICATOR HAVING A BODY WITH A PASSAGEWAY FOR FLOW OF FLUID THERETHROUGH AND WITH INTERIOR SURFACES DEFINING A CAVITY HAVING AN OPENING AT THE TOP OF SAID BODY AND AN INTERSECTION WITH SAID PASSAGEWAY AND BEING ABOVE SAID PASSAGEWAY FOR MOUNTING A LENS AND WITH A LENS DISPOSED IN SAID CAVITY SO THAT A SUBSTANTIAL PART OF ITS TOP SURFACE IS EXPOSED AND SO THAT THE UNDERSIDE OF SAID LENS FORMS A PART OF SAID PASSAGEWAY, THE INVENTION COMPRISING AT LEAST FIRST AND SECOND MOISTURE INDICATOR ELEMENTS DISPOSED AT THE UNDERSIDE OF SAID LENS, EACH INDICATOR ELEMENT BEING SUBSTANTIALLY IN ALIGNMENT WITH A PORTION OF THE EXPOSED TOP SURFACE OF SAID LENS SUBSTANTIALLY ADJACENT A PERIPHERAL PART THEREOF, SAID FIRST ELEMENT BEING MADE TO INDICATE MOISTURE CONTENT OF A FIRST FLUID TRAVERSING SAID INDICATOR BY COLORS, SAID SECOND ELEMENT BEING MADE TO INDICATE MOISTURE CONTENT OF A SECOND FLUID BY COLORS, A FIRST DETACHABLE COVER FOR SAID FIRST MOISTURE INDICATOR ELEMENT DISPOSED SUBSTANTIALLY OVER THAT PART OF THE TOP SURFACE OF SAID LENS IN ALIGNMENT WITH SAID FIRST ELEMENT AND EXTENDING SUBSTANTIALLY OVER SAID FIRST ELEMENT TO COVER SAME FROM OBSERVATION BY A VIEWER, A SECOND DETACHABLE COVER FOR SAID SECOND ELEMENT DISPOSED SUBSTANTIALLY OVER THAT PART OF THE TOP SURFACE OF SAID LENS IN ALIGNMENT WITH SAID SECOND ELEMENT AND EXTENDING SUBSTANTIALLY OVER SAID SECOND ELEMENT TO COVER SAME FROM OBSERVATION BY SAID VIEWER, SAID FIRST COVER HAVING INDICIA WHICH IDENTIFIES AT LEAST ONE OF SAID SECOND FLUID AND OF SAID COLORS WHICH INDICATE MOISTURE CONTENT OF SAID SECOND FLUID, SAID SECOND COVER HAVING INDICIA WHICH IDENTIFIES AT LEAST ONE OF SAID FIRST FLUID AND OF SAID COLORS WHICH INDICATE MOISTURE CONTENT OF SAID FIRST FLUID.