Method and device for controlling the quantity of liquid contained in a cartridge for an aerosol generating device, wherein the cartridge has a container and a liquid contained in the container and wherein, according to which is measured the quantity of liquid contained in the cartridge; and compared the quantity of liquid with a reference quantity of liquid.

The invention relates to a sensor device and a method for detecting properties of a liquid. The liquid is accommodated in an inner chamber 14. A capacitor arrangement 22, 26 in the inner chamber has spaced, opposing capacitor surfaces 24a, 24b, 28a, 28b so that at least part of the liquid accommodated in the inner chamber 14 is arranged between the capacitor surfaces 24a, 24b, 28a, 28b. An evaluation device 30 for supplying an output signal A depending on a capacitance value C1, C2 of the capacitor arrangement 22, 24 comprises an excitation circuit 32 and an evaluation circuit 34. The excitation circuit 32 has at least one measuring resistor R1, R2, R1a, R1b and means for applying an AC voltage to a series circuit consisting of the measurement resistor R1, R2, R1a, R1b and the capacitor arrangement 22, 24. The evaluation circuit 30 has means for supplying the output signal A by measuring a voltage U1, U2 across the capacitor arrangement 22, 24.

The invention relates to a sensor device and a method for detecting properties of a liquid. The liquid is accommodated in an inner chamber 14. A capacitor arrangement 22, 26 in the inner chamber has spaced, opposing capacitor surfaces 24a, 24b, 28a, 28b so that at least part of the liquid accommodated in the inner chamber 14 is arranged between the capacitor surfaces 24a, 24b, 28a, 28b. An evaluation device 30 for supplying an output signal A depending on a capacitance value C1, C2 of the capacitor arrangement 22, 24 comprises an excitation circuit 32 and an evaluation circuit 34. The excitation circuit 32 has at least one measuring resistor R1, R2, R1a, R1b and means for applying an AC voltage to a series circuit consisting of the measurement resistor R1, R2, R1a, R1b and the capacitor arrangement 22, 24. The evaluation circuit 30 has means for supplying the output signal A by measuring a voltage U1, U2 across the capacitor arrangement 22, 24.

Methods and systems for monitoring fluid levels and electrolyte levels used in a dialysis machine. A receptacle, configured to receive a container, comprises a plurality of curved side panels and a base to form a cylindrical shaped cavity for receiving a container. Each panel includes a conductive material on its inner surface and, optionally, a shielding on its outer surface. An electronics component housed within, or near, the receptacle drives the capacitive process and interprets generated data to determine fluid levels and compositions. An alternate receptacle includes one or two coils wrapped about the container and uses induction to determine fluid level.

A device for controlling an optical recognition unit with the help of a capacitive filling level measurement in liquid containers having a sensor with a measuring electrode, a conductive base plate suitable for arranging at least one liquid container or a carrier unit having at least one receptacle for receiving a liquid container, a sensor electronics unit that is connected to the measuring electrode and the base plate adapted to determine a capacitance between the measuring electrode and base plate, an evaluation unit, and a control unit for controlling the optical recognition unit, is disclosed.

Provided is a liquid sensor capable of relatively accurately detecting the liquid level even if vibration or the like occurs. The liquid sensor is configured to detect a liquid level in a state in which at least a portion of the liquid sensor is immersed in liquid. This liquid sensor includes a substrate. The substrate is provided with a hole. An inner circumferential surface of the substrate is formed around the hole. A first electrode and a second electrode facing the first electrode are formed on the inner circumferential surface. The liquid sensor further includes a detection circuit. The detection circuit is configured to detect capacitance between the first and second electrodes.

A securement arrangement for introducing a field instrument into a container includes a connection adapter and a sealing element. The field instrument includes a housing and a sensor. The sensor of the field instrument protrudes inwardly into the container, and the field instrument serves for determining and/or monitoring a process variable of a medium in the container. The connection adapter includes a cylindrical basic body, on which a first securement element is arranged for securing the connection adapter to the field instrument. The connection adapter surrounds the field instrument when the connection adapter is secured to the field instrument. A second securement element is also arranged on the connection adapter for securing the connection adapter to a container adapter. The container adapter surrounds the connection adapter when the container adapter is secured to the connection adapter. A first support of the connection adapter accommodates the sealing element.

A system includes a fuel level sensing probe inside a fuel tank and an exciter wire bundle to connect the fuel level sensing probe to a power source outside the tank. The exciter wire bundle includes an excitation wire and a grounded guard wire. The excitation wire and the grounded guard wire each include a resistive non-metallic wire. The system also includes a return signal wire bundle to connect the fuel level sensing probe to a device configured to measure a quantity of fuel within the tank. The return signal wire bundle includes a return signal wire and a grounded guard wire. The grounded guard wire of the return signal wire bundle and the grounded guard wire of the exciter wire bundle are configured to shield the return signal wire from electromagnetic interference. The return signal wire and the grounded guard wire each include a resistive non-metallic wire.

A system includes a fuel level sensing probe inside a fuel tank and an exciter wire bundle to connect the fuel level sensing probe to a power source outside the tank. The exciter wire bundle includes an excitation wire and a grounded guard wire. The excitation wire and the grounded guard wire each include a resistive non-metallic wire. The system also includes a return signal wire bundle to connect the fuel level sensing probe to a device configured to measure a quantity of fuel within the tank. The return signal wire bundle includes a return signal wire and a grounded guard wire. The grounded guard wire of the return signal wire bundle and the grounded guard wire of the exciter wire bundle are configured to shield the return signal wire from electromagnetic interference. The return signal wire and the grounded guard wire each include a resistive non-metallic wire.

Disclosed is a method for diagnosis of a two-conductor field instrument and a corresponding two-conductor field instrument. In a normal operating mode, an input voltage is provided and an output current is output. In a diagnostic operating mode, the method includes: providing a first diagnosis-input voltage and outputting a first diagnosis-output current during a first time interval, providing a second diagnosis-input voltage and outputting a second diagnosis-output current during a second time interval, determining the second time interval from the first time interval, registering a first and second diagnosis-output voltage as a function of the first and second diagnosis-output current, and checking the functionality of the two-conductor field instrument by the first and second diagnosis-input voltage, the first and second time interval, the first and second diagnosis-output electrical current, the first and second diagnosis-output voltage based on the input voltage and/or based on the output electrical current.