A fluid level sensing device includes a substrate (210) and a sensing die (216) cantilevered at one end from the substrate. A number of sensing components (218), preferably thermal or impedance sensing components, are disposed on the sensing die and detect a fluid level in a fluid reservoir. A protective member (208) is also cantilevered at one end from the substrate alongside the sensing die. Electrical interconnects (212) output data collected from the number of sensing components. A number of sensing dies may be provided to lengthen the sensing device, in which case the protective cover extends alongside and parallel to the number of sensing dies.

In one example in accordance with the present disclosure a fluid property sensing device is described. The fluid property sensing device includes a substrate having a trench formed therein. The trench includes a bottom surface and opposite side surfaces. A first electrode is disposed on a first side surface of the trench and a second electrode is disposed on a second side surface of the trench. The first electrode and second electrode form a capacitor to measure a complex impedance of a fluid that fills a space between the first electrode and the second electrode. This complex impedance indicates a property of the fluid. A fluid level sensing die, having a number of fluid level sensing components disposed thereon, may be attached to the substrate, preferably in such a way that the fluid level sensing die is surrounded by the trench. In this way the surface area of the electrodes provided in the trench can be increased. The number of level sensing components may be thermal sensing components.

A molten metal level measuring device in a continuous molten metal level measuring device uses temperature compensation. The device includes a cylindrical bobbin, a liquid level measuring unit helically wound around an outer surface of the bobbin, a circular inner cylinder in which the bobbin and the liquid level measuring part are located and which seals the bobbin and the liquid level measuring part from the outside and has the same axial direction as the bobbin, and a cylindrical protective tube in which the inner cylinder is located and which has the same axial direction as the bobbin and has one open end. Thermocouples extend axially in the space between the inner cylinder and the protective tube, and a control unit controls the liquid level measuring part to measure a liquid level of the molten metal based on the temperatures measured by the thermocouples.

A fluid level detecting system provides an input signal at a specific frequency to a sample in a container. A probe contacts the energized sample and provides a signal to a level sensing circuit. The level sensing circuit amplifies the signal from the probe and then bandpass filters, tuned to the specific frequency, the amplified signal. This filters out extraneous signals received from, for example, a cover on the container, and specifically identifies when the probe has contacted the sample fluid by comparing the filtered signal to threshold levels.

A system includes a container having an inner chamber for storing fluid, at least one measuring probe arranged within the chamber and one ground probe arranged within or near a bottom of the chamber. There is at least one impedance electrically connected with a processor which is electrically connected with the at least one measuring probe. A signal generator has a first voltage terminal electrically connected with the at least one impedance and a second voltage terminal electrically connected with the ground probe. When a signal is sent from the signal generator to the measuring probe, an electrochemical reaction occurs at the measuring probe and ground probe and stores a charge if the measuring probe and/or ground probe are immersed in fluid. The processor measures the voltage, current and power of the signal to calculate the resistance and capacitance of the fluid within the container to determine the level of fluid in the container. A method for measuring the level of fluid in the container includes the steps of applying at least one time-varying voltage signal to the one or more measuring probes, creating an electrochemical reaction between the ground probe and each measuring probe, storing energy around each probe that is submerged in fluid, measuring the current and power of the signals, and determining the level of fluid in the container based on the calculated capacitance and resistance of the fluid within the container.

The present inventions is concerned with an apparatus and a method of improving the accuracy of coating a ceramic or metallic honeycomb body, which can usually be used as a catalyst in automotive exhaust mitigation. The invention achieves to directly test whether the coating slurry in the coating chamber is ready to be submitted to the monolith or needs to be replaced before coating the monolith.

A urine handling system capsule for releasing an oil mixture in the lumen of a urine handling system, the capsule comprising a capsule wall defining a space filled with an oil mixture, wherein the oil mixture comprises 90-100% of an oil selected from the group consisting of silicone fluids and mineral oils or a mixture thereof, and having a viscosity of at most 600 cSt, and wherein the capsule wall is made of a water-soluble material. A urine measurement system comprising an oil mixture arranged in the luminal space of the measurement system. A method for inhibiting impairment of functionality and measurement accuracy in a urine measurement system comprising applying an oil mixture to the inner surfaces of the urine measurement system. Use of an oil mixture in treatment of luminal surfaces of a urine handling system.

A multi-layer wireless sensor construct is provided. The construct includes a first dielectric layer adapted to be attached to a portion of a first surface of an electrically-conductive material. A layer of mu metal is provided on the first dielectric layer. A second dielectric layer is provided on the layer of mu metal. An electrical conductor is provided on the second dielectric layer wherein the second dielectric layer separates the electrical conductor from the layer of mu metal. The electrical conductor has first and second ends and is shaped to form an unconnected open-circuit that, in the presence of a time-varying magnetic field, resonates to generate a harmonic magnetic field response having a frequency, amplitude and bandwidth.

The application discloses an apparatus and a method for determining and/or monitoring at least one predefined filling level of a medium in a container at least with a sensor unit and an electronic unit, wherein the electronic unit is configured to apply an excitation signal to the sensor unit and to receive a reception signal from the sensor unit, and wherein the electronic unit comprises at least one first computing unit which is configured to determine at least the predefined filling level from the reception signal in a normal operating mode, a second computing unit which is configured to make a statement relating to the state of the sensor unit in a diagnostic operating mode, at least one buffer which is configured to store the at least one statement relating to the state of the sensor unit and is electrically connected to the first computing unit and to the second computing unit, and at least one switching element which can be used to switch back and forth between the normal operating mode and the diagnostic operating mode.

A sensor for determining liquid level in a liquid reservoir can include a primary inductor and a secondary inductor to be associated with sides of the reservoir that changes shape as a volume of liquid changes or is displaced within the liquid reservoir. The sensor can include an electrical power source to inductively couple the primary inductor and the secondary inductor. The liquid level sensor can include an inductive coupling measurement device associated with the primary inductor and/or the secondary inductor to measure a characteristic indicative of the inductive coupling of the primary inductor and the secondary inductor (e.g., a distance between inductors). As liquid volume changes and the reservoir deforms, the inductors move relative to each other and a voltage change occurs to determine a liquid level in the reservoir. A sensor kit is provided.