An apparatus for identifying and measuring a volume fraction constituent of a fluid , comprising: a source of fluid with a known temperature, and having a volume fraction constituent , and wherein the volume fraction constituent has a previously calculated, and known dielectric constant and previously calculated and known resonance points, and wherein information about the previously calculated, and known dielectric constant and previously calculated and known resonance points of the volume fraction constituent is stored in, and is accessible from a database ; a probe exposed, at least in part, to the fluid , and wherein the probe has a known length; an electrical pulse emitter which electronically generates a predetermined electrical pulse which is delivered to the probe , and which further travels the known length of the probe and which generates an electrical pulse reflection; an electrical pulse sampler which electronically communicates with the probe and which further receives and senses the electrical pulse reflection generated by the electrical pulse within the probe ; a computer electrically coupled with the probe , electrical pulse emitter, electrical pulse sampler and the database , and wherein the computer determines a time period between the electrical pulse emission into the probe , and receipt of the sensed electrical pulse reflection, and wherein resonance points of the volume fraction constituent are calculated by the computer from the determined time period, and wherein the computer further correlates the determined time period to the previously calculated, and known dielectric constant and the previously calculated and known resonance points of the volume fraction constituent as provided in the database so as to identify the volume fraction constituent in the fluid ; and a user interface electrically coupled with the computer , and which further generates a user perceivable output which identifies the volume fraction constituent . a source of fluid with a known temperature, and having a volume fraction constituent , and wherein the volume fraction constituent has a previously calculated, and known dielectric constant and previously calculated and known resonance points, and wherein information about the previously calculated, and known dielectric constant and previously calculated and known resonance points of the volume fraction constituent is stored in, and is accessible from a database ; a probe exposed, at least in part, to the fluid , and wherein the probe has a known length; an electrical pulse emitter which electronically generates a predetermined electrical pulse which is delivered to the probe , and which further travels the known length of the probe and which generates an electrical pulse reflection; an electrical pulse sampler which electronically communicates with the probe and which further receives and senses the electrical pulse reflection generated by the electrical pulse within the probe ; a computer electrically coupled with the probe , electrical pulse emitter, electrical pulse sampler and the database , and wherein the computer determines a time period between the electrical pulse emission into the probe , and receipt of the sensed electrical pulse reflection, and wherein resonance points of the volume fraction constituent are calculated by the computer from the determined time period, and wherein the computer further correlates the determined time period to the previously calculated, and known dielectric constant and the previously calculated and known resonance points of the volume fraction constituent as provided in the database so as to identify the volume fraction constituent in the fluid ; and a user interface electrically coupled with the computer , and which further generates a user perceivable output which identifies the volume fraction constituent . <EOS>