A sensor device is utilized to perform a first measurement of a first content fill level of a first container at a first instance. The same sensor device is utilized to perform a second measurement of a second content fill level of a second container at a second instance. Based at least in part on an analysis of both the first measurement and the second measurement, it is automatically identified that the sensor device has been moved from the first container to the second container. Based at least in part on the identification, an inventory record tracking a number of remaining full containers is automatically updated.

A level measurement system including a tank, a transducer, and a controller. The tank is configured to contain a liquid. The transducer is configured to output an ultrasonic signal into the tank. The controller has a memory and electronic processor. The controller is electrically coupled to the transducer and is configured to determine a ring time of the transducer, and determine a level of the liquid contained within the tank based on the ring time of the transducer.

The a vibration sensor comprising a membrane that can be stimulated so as to oscillate by means of a piezoelectric drive, and a mechanical oscillator arranged on the membrane, at least one piezoelectric element of the drive comprising at least one first electrical contact structure on an upper side of the piezoelectric element and at least one second electrical contact structure on a lower side of the piezoelectric element, such that the at least one piezoelectric element is designed so that an active area of the piezoelectric element corresponds to an area of a mechanical deformation of the unidirectional curvature of the membrane, during a pre-defined eigenmode of the mechanical oscillator.

The present disclosure relates to an ultrasound transducer having at least one transducer element for sending or receiving ultrasound signals. The ultrasound transducer includes a matching element acoustically coupled to the transducer element that is designed to ensure acoustic matching between the transducer element and a medium that acts on the matching element. In a first subregion of the axial extent, the matching element partially fills each cross section of the matching element, and a filling component in the first subregion along the first longitudinal axis monotonically increases in the direction of the first side. The matching element has a plurality of ring elements in the first subregion arranged concentrically around the first longitudinal axis. Each ring element partially fills each cross section in the first subregion, wherein the first subregion comprises at least 80% of an axial extent of the matching element along the first longitudinal axis.

A liquid surface sensor includes a hollow member having a first opening end and a second opening end, and a sensor unit provided so as to close the first opening end of the hollow member. The sensor unit includes a vibration plate, and a piezoelectric element which is provided on the vibration plate and is formed by laminating a first electrode film, a piezoelectric film, and a second electrode film in a thickness direction of the vibration plate.

A sensor detects a fuel level and fuel concentration in a fuel tank of a flexible fuel vehicle (FFV) that uses flexible fuel such as ethanol fuel or alcohol fuel. The fuel sensor includes: a level sensor which is inserted into a lower surface of a pump module housing; and a concentration sensor which is mounted on a side surface of the pump module housing.

A device for providing a gas and temperature compensated acoustic measurement of the level of a liquid surface, including a transmitter, a receiver, and a waveguide for guiding acoustic signals. The waveguide includes a reference portion extending from a first end to a reference element, and a measurement portion extending from the reference element towards the end. The device further includes a channel extending from at least one inlet in said reference portion to at least one outlet in said measurement portion, the channel being separated from the waveguide so as to provide a fluid flow independent of the waveguide, and a gas-pump arranged to create a gas flow in said channel from said at least one inlet to said at least one outlet.

The present invention relates to a method for monitoring a condition of a vibronic sensor, which serves for determining and/or monitoring at least one process variable of a medium in a container and which includes at least one sensor unit having a mechanically oscillatable unit. The method includes steps of ascertaining a measured value for at least one physical and/or chemical variable (f, f.sub.0) characteristic for the vibronic sensor, while the sensor is located at/in its location of use, comparing the measured value of the physical and/or chemical variable (f, f.sub.0) with a reference value (f.sub.ref, f.sub.0,ref) for the variable, and ascertaining a condition indicator from the comparison.

An arrangement for transmitting and/or receiving an ultrasonic, wanted signal in a measured medium, comprising a vibration decoupling element for securing at least one ultrasonic transducer in a containment, characterized in that the vibration decoupling element has a platform for securing the vibration decoupling element to a sensor nozzle or to the containment and a second interface for securing an ultrasonic transducer. Between the second interface and the platform a vibration decoupling structural element is arranged, which structural element is embodied as a solid body, which has one or more interfaces with other elements of the vibration decoupling element, especially with the second interface for securing the ultrasonic transducer and/or the platform, and wherein the structural element (11, 39, 55, 75) has an as much as possible spherical-, ellipsoidal-, toroidal- or polyhedral shape.

A sensor device includes an interrogation signal transmitter configured to transmit an interrogation signal to determine an identifier associated with an amount of content included in a container engaged by the sensor device. The interrogation signal transmitter is configured to transmit the interrogation signal that travels through air included in the container to reflect off the content in the container.