Abstract: System and method for non-destructively testing a specimen by acoustic waves. The method includes: receiving from a testing device at a measurement position, in mechanical contact with the specimen, raw data representing acoustic waves that propagated through the specimen; providing options to process the raw data by at least a first and a second processing algorithm; processing the raw data by at least one of the first and the second processing algorithm. The first processing algorithm derives information about the specimen from multiple reflections of the acoustic waves. The second processing algorithm derives information about the specimen from a travel time of a single reflection of the acoustic waves. Further, the system includes a testing device having a housing, a contact element protruding from the housing and a cavity. An acoustic wave sensor mounted in the cavity.

Abstract: The invention comprises a thermal flow sensor for determining the temperature and the flow velocity of a flowing measuring medium, comprising: a functional element which is configured to determine the temperature of the measuring medium and to influence the temperature of the measuring medium; and a control and evaluation unit which is configured to determine the temperature of the measuring medium in a first interval of time by means of the functional element and to determine the flow velocity of the measuring medium in a second interval of time following the first interval of time, and a method for determining the temperature and the flow velocity of the measuring medium by means of the thermal flow sensor according to the invention, and a sensor system comprising such a thermal flow sensor and a further sensor type.

Abstract: The invention comprises a thermal flow sensor (1) for determining the temperature and the flow velocity of a flowing measuring medium (210), comprising:—a functional element (110) which is configured to determine the temperature of the measuring medium (210) and to influence the temperature of the measuring medium (210); and—a control and evaluation unit (120) which is configured to determine the temperature of the measuring medium (210) in a first interval of time by means of the functional element (110) and to determine the flow velocity of the measuring medium (210) in a second interval of time following the first interval of time, and a method for determining the temperature and the flow velocity of the measuring medium (210) by means of the thermal flow sensor (1) according to the invention, and a sensor system comprising such a thermal flow sensor (1) and a further sensor type.