In an embodiment an ultrasonic transducer includes an ultrasonic unit with a housing in which a piezoelectric element is located, wherein the ultrasonic unit includes at least one electrical connecting lead leading out of the housing, the connecting lead being configured for connection to control and/or evaluation electronics arranged separately from the ultrasonic unit, and wherein the ultrasonic unit is configured to operate in a thickness oscillation mode.

Various embodiments of the teachings herein include a fluid sensor apparatus for capturing a filling level and/or a quality of a fluid in a fluid container. The fluid sensor apparatus may include: a printed circuit board having a recess extending at least partially into the printed circuit board along a thickness and a fastening area; an ultrasonic transducer fitted to the fastening area so the ultrasonic transducer extends at least partially over the recess; and a housing at least partially surrounding the printed circuit board and the ultrasonic transducer so a portion of the housing area is arranged in the recess.

A multi-path acoustic signal apparatus, system, and apparatus for use in material detection are provided. The method includes transmitting at least one acoustic signal from each of a plurality of acoustic transceivers positioned along a first portion of the fluid container. The at least one transmitted acoustic signal is received with at least one additional acoustic transceiver positioned along a second portion of the fluid container, wherein the second portion is substantially opposite the first portion of the fluid container. A composition of the physical material within the fluid container is determined based on the at least one received acoustic signal.

Provided are a system and a method for measuring a liquid level of a vehicle fuel tank, and more particularly, to a system for measuring a liquid level of a vehicle fuel tank including an ultrasonic sensor unit provided on a bottom surface in the vehicle fuel tank to acquire measurement data for calculating a distance from the bottom surface in the fuel tank to a fuel surface and a central processing unit using the measurement data transmitted from the ultrasonic sensor unit by a preset number of times for a preset time to calculate liquid level information of the fuel tank.

Provided is a fuel pump module for measuring a height of fuel using an ultrasonic wave, and more particularly, a fuel pump module for measuring a height of fuel using an ultrasonic wave, where an ultrasonic wave sensor for measuring the height of the fuel contained in a fuel tank is integrally installed in the fuel pump module provided in the fuel tank.

Implementations of the present disclosure are directed to an injection device (102) including a medicament reservoir (103) configured to store a medicament to be expelled by the injection device (102), an acoustic source (122a, 122b, 122c, 122d, 200, 300, 400) configured to generate an acoustic signal including information indicative of an amount of the medicament stored in the medicament reservoir (103), the acoustic signal being transmitted to an external device (104) configured to process the acoustic signal and to extract injection device data.

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 sensor includes a substrate having a curved surface, a piezoelectric element, and an adhesive disposed between the piezoelectric element and the curved surface along a vertical direction. The adhesive attaches the piezoelectric element to the substrate. The adhesive has an exterior bond surface that has a tapered shape along the vertical direction from the piezoelectric element to the curved surface.

A filling level transmitter includes a sound-conducting tube and a filling level sensor. The filling level sensor has: a housing including a ceramic substrate and a metal lid soldered to the substrate, an ultrasonic transceiver arranged in the housing and having a sound-outputting region, the ultrasonic transceiver being connected by at least the sound-outputting region to the substrate, and sensor electronics arranged in the housing.

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.