Ultrasonic fluid measurement probe with ultrasonically welded base cap

A method of enhancing reliability of an ultrasonic fluid measurement probe, comprising:

• generating an ultrasonic signal by an ultrasonic transducer in a transducer chamber in a base of the ultrasonic fluid measurement probe such that the ultrasonic signal is directed into a tube attached to the base of the ultrasonic fluid measurement probe, wherein the transducer chamber comprises a transducer chamber floor, transducer chamber walls, and a cap welded to an edge of the transducer chamber walls such that the cap, along with the transducer chamber floor and the transducer chamber walls, encloses the transducer chamber to form an enclosed air space;
• and
• detecting a reflection of the ultrasonic signal by the ultrasonic transducer.

A method of enhancing reliability of an ultrasonic fluid measurement probe, comprising:

• attaching an ultrasonic transducer to a transducer chamber floor of a transducer chamber in a base, wherein the transducer chamber comprises the transducer chamber floor, a transducer chamber edge, and transducer chamber walls extending from the transducer chamber floor to the transducer chamber edge;
• and
• welding a cap to the transducer chamber edge such that the cap, along with the transducer chamber floor and the transducer chamber walls, encloses the transducer chamber to form an enclosed air space between the ultrasonic transducer and the cap.