Patent ID: 7246631

Claim:
A system for monitoring a mixture ratio of a two-part fluid, at least one of the two parts of the fluid including conductive particles, the two parts to be mixed to make the two-part fluid, the concentrations of the two parts in the two-part fluid defining the mixture ratio, the system comprising: a pair of electrodes to be disposed on opposite sides of at least a portion of the two-part fluid made by mixing the two parts, wherein the two-part fluid forms a dielectric and said pair of electrodes and the dielectric operate as a capacitor; a controller communicating with the capacitor in a manner so that the capacitance of the capacitor as sensed by the circuit varies as a function of the mixture ratio of the two-part fluid; an output from the capacitor communicating with the controller and being representative of the mixture ratio of the two-part fluid; and a timer in communication with said controller for measuring a time where a mixing of said two parts of said fluid began and a time at which sensing of said two-part fluid is made.