Abstract: An integrated test device adapted to perform tests on a single aliquot of a liquid sample. The test device includes a viscosity test cell adapted to perform viscosity tests on the liquid sample; a freeze point test cell adapted to perform freeze point tests on the liquid sample; a sample injection port adapted to load the single aliquot of the liquid sample into both of the viscosity test cell and the freeze point test cell, where the viscosity test cell and the freeze point test cell are connected in parallel to the sample injection port; a data processing unit to collect data from the viscosity test cell and the freeze point test cell and process the data, the data processing unit performing calculations to determine temperatures at any specified viscosity above a freeze point and checks of integrity of the viscosity measurements.

Abstract: An apparatus and method for the measurement of wax appearance temperature and wax disappearance temperature. The apparatus includes the following. The sample receptacle having a receptacle opening, including a bottom, at least one side and an open top. The sample receptacle including an inlet and an outlet for sample insertion and removal. The at least one side about the receptacle opening being light absorbing. The sample receptacle including a transparent cover mounted over the open top. The bottom of the receptacle opening having a reflective upper surface. A thermo device temperature change of the sample. A thermometer to register current temperature of the sample. A viewing chamber above the transparent cover, where the viewing chamber is surrounded by material that is light absorbing. A light emitting device to project light through the viewing chamber and the transparent cover.