Abstract: A fluid sensor assembly is provided. The fluid sensor assembly includes a base and a cap. The base is configured to receive a fluid sensor, the base forming a plurality of receiving apertures positioned about a perimeter of the base. The cap is configured to fit on the base and form a fluid-tight seal between the cap and the base, the cap including a plurality of articulating levers, each articulating lever of the plurality of articulating levers being configured to rotate about a central axis and including a latching feature configured to be inserted into a receiving aperture of the plurality of receiving apertures when the cap is fitted on the base and to lock the cap to the base upon rotation of the articulating levers.

Abstract: A fluid sensor assembly is provided. The fluid sensor assembly includes a flange, a base, and a cap. The flange is configured to mount to a fluid container. The base is configured to receive a fluid sensor, the base rotatably mounted to the flange and configured to rotate about the flange, the base forming a plurality of receiving apertures positioned about a perimeter of the base. The cap is configured to lock on the base and form a fluid-tight seal between the cap and the base.

Abstract: A fluid sensor assembly is provided. The fluid sensor assembly includes a flange, a base, and a cap. The flange is configured to mount to a fluid container. The base is configured to receive a fluid sensor, the base rotatably mounted to the flange and configured to rotate about the flange, the base forming a plurality of receiving apertures positioned about a perimeter of the base. The cap is configured to lock on the base and form a fluid-tight seal between the cap and the base.

Abstract: A fluid sensor assembly is provided. The fluid sensor assembly includes a base and a cap. The base is configured to receive a fluid sensor, the base forming a plurality of receiving apertures positioned about a perimeter of the base. The cap is configured to fit on the base and form a fluid-tight seal between the cap and the base, the cap including a plurality of articulating levers, each articulating lever of the plurality of articulating levers being configured to rotate about a central axis and including a latching feature configured to be inserted into a receiving aperture of the plurality of receiving apertures when the cap is fitted on the base and to lock the cap to the base upon rotation of the articulating levers.

Abstract: A high precision, reciprocating bob viscometer is shown that has two coils (A and B) encircling a reciprocating bob. Coil A is energized with a combined sinusoidal and DC signal, while coil B senses the position of the reciprocating bob, then the functions of coils A and B are reversed. By use of a large digitally-generated near resonance frequency sinusoidal signal, noise is reduced because there is no need for amplification. The sensed signal amplitude measurement is in the digital time domain instead of through analog amplitude measurements, which further eliminates signal noise. These advancements provide faster, highly accurate, low noise measurements of bob position and velocity to determine fluid/gas viscosity and related properties using a reciprocating bob viscometer. These related properties include measurements of density, shear sensitivity, yield stress, and other measurements described in prior art patents.

Abstract: In the production of petroleum-based products in a refinery, viscosity and density are accurately and repeatedly measured at an elevated temperature, sometimes in a hostile environment. A densitometer and viscometer are located in a non-purged enclosure, but the electrical controls that could cause a spark to ignite fumes are located in a purged enclosure with connections there between. A heat pipe extending from the purged enclosure to the non-purged enclosure accurately controls the temperature of a sample during testing. For difficult to handle petroleum-based products such as asphalt, a sample conditioning system prepares the sample prior to testing.

Abstract: A high precision, reciprocating bob viscometer is shown that has two coils (A and B) encircling a reciprocating bob. Coil A is energized with a combined sinusoidal and DC signal, while coil B senses the position of the reciprocating bob, then the functions of coils A and B are reversed. By use of a large digitally-generated near resonance frequency sinusoidal signal, noise is reduced because there is no need for amplification. The sensed signal amplitude measurement is in the digital time domain instead of through analog amplitude measurements, which further eliminates signal noise. These advancements provide faster, highly accurate, low noise measurements of bob position and velocity to determine fluid/gas viscosity and related properties using a reciprocating bob viscometer. These related properties include measurements of density, shear sensitivity, yield stress, and other measurements described in prior art patents.

Abstract: A sensor for making rheological measurements takes the form of a ferromagnetic bob alternately driven through a sample fluid in opposite directions by magnetic force from two alternately driven coils. The bob's position affects the mutual inductance between the coils, so it can be inferred by sensing the signal that current flowing in one coil induces in the other, and rheological properties are determined from the relationships among the bob's motion, the coil current, and the sensor geometry. Some such measurements' accuracies are enhanced by computing bob acceleration and suppressing inertial effects thereby detected.

Abstract: A sensor for making rheological measurements takes the form of a ferromagnetic bob alternately driven through a sample fluid in opposite directions by magnetic force from two alternately driven coils. The bob's position affects the mutual inductance between the coils, so it can be inferred by sensing the signal that current flowing in one coil induces in the other, and rheological properties are determined from the relationships among the bob's motion, the coil current, and the sensor geometry. Some such measurements' accuracies are enhanced by computing bob acceleration and suppressing inertial effects thereby detected.