Abstract: A temperature sensing unit includes a temperature sensor and a substrate including a first region and a second region. The temperature sensor is arranged in the second region. The second region extends away from the first region.

Abstract: A suction tube filter arrangement includes a suction tube defining a suction tube direction and a filter member extending along the suction tube direction. The suction tube is at least partially arranged inside the filter member.

Abstract: An assembly for determining a type of a fluid, the assembly configured to be mounted to a tank containing the fluid, comprises an ultrasound sending/receiving subassembly and a processor module. The ultrasound sending/receiving subassembly is configured to send a plurality of ultrasound signals into the fluid and receive the ultrasound signals reflected from the fluid. An ultrasound signal of the plurality of ultrasound signals has at least a first frequency and a second frequency different from the first frequency. The processor module is adapted to determine an attenuation of the ultrasound signal at the first frequency and at the second frequency.

Abstract: A system for detecting the presence of bubbles in a solution includes an ultrasonic receiver, receiving a pair of signals having different frequencies after passage through the solution, and a computing unit. The computing unit computes a signal value for each of the signals, the signal value representing a defined signal property, compares the signal values for the signals with each other and/or each with a predefined reference value, and computes a deviation of the signal values from each other and/or between the signal values and the predefined reference value. The computing unit generates a bubble confirmation signal that confirms the presence of bubbles in the solution if the deviation is greater than a predefined threshold value.

Abstract: A method for detecting a property of a liquid medium comprises generating an ultrasonic pulse, receiving a first echo and a second echo of the ultrasonic pulse transmitted through the liquid medium, and generating a first amplitude signal for the first echo and a second amplitude signal for the second echo. The method includes calculating an amplitude signal ratio between the first amplitude signal and the second amplitude signal and determining a property signal representing the property of the liquid medium.

Abstract: A sensor head for being arranged in an orifice of a fluid tank includes an opening in fluid communication with a fluid return line returning a fluid to the fluid tank and a bubble reducer device disposed at the opening. The bubble reducer device is configured to block bubbles in the fluid in the fluid return line while the fluid passes through the bubble reducer device during operation.

Abstract: A sensor assembly for measuring a level of a liquid includes a measuring section through which a measuring current runs during operation of the sensor assembly and a temperature compensation section. The temperature compensation section compensates a temperature dependent variation of the measuring current within a predetermined operational temperature range.

Abstract: A method for detecting an open circuit state failure in a piezoelectric element connection includes exciting a piezoelectric element with an excitation signal and monitoring and evaluating an electrical output signal generated by the piezoelectric element in response to the excitation signal. The excitation signal is a pulse train. A frequency of the pulse train is chosen such that the piezoelectric element acts as a low pass filter.

Abstract: A connection head for being arranged in an orifice of a fluid tank with a return cavity in the form of a radial duct is provided. The return cavity overcomes the problems of the formation of air bubbles in the tank and enhances the functioning of the sensor in the tank.

Abstract: An attachment system for attaching a sensor to a substrate includes a first layer of adhesive attaching to the sensor and a second layer of adhesive attaching to the substrate. The first layer is attached to the second layer and the first layer differs from the second layer in at least one of elasticity and hardness.

Abstract: A method for detecting an open circuit state failure in a piezoelectric element connection includes exciting a piezoelectric element with an excitation signal and monitoring and evaluating an electrical output signal generated by the piezoelectric element in response to the excitation signal. The excitation signal is a pulse train. A frequency of the pulse train is chosen such that the piezoelectric element acts as a low pass filter.

Abstract: A method for detecting a property of a liquid medium comprises generating an ultrasonic pulse, receiving a first echo and a second echo of the ultrasonic pulse transmitted through the liquid medium, and generating a first amplitude signal for the first echo and a second amplitude signal for the second echo. The method includes calculating an amplitude signal ratio between the first amplitude signal and the second amplitude signal and determining a property signal representing the property of the liquid medium.

Abstract: A sensor head for being arranged in an orifice of a fluid tank includes an opening in fluid communication with a fluid return line returning a fluid to the fluid tank and a bubble reducer device disposed at the opening. The bubble reducer device is configured to block bubbles in the fluid in the fluid return line while the fluid passes through the bubble reducer device during operation.

Abstract: A sensor assembly for measuring a level of a liquid includes a measuring section through which a measuring current runs during operation of the sensor assembly and a temperature compensation section. The temperature compensation section compensates a temperature dependent variation of the measuring current within a predetermined operational temperature range.

Abstract: An electronic system for a fluid property sensor comprises a fluid printed circuit board adapted to analyze a property of a fluid, an external connector, and an intermediate printed circuit board. The intermediate printed circuit board is electrically connected between the fluid printed circuit board and the external connector.