Abstract: An ultrasonic device, the device comprising at least one flexible ultrasonic transducer; and a clamp configured to mount the at least one transducer to a test object. Optionally, the clamp may comprise one or more bands and wherein the one or more bands can optionally be metal or at least part of the one or more bands may be formed of a conformable material such that the one or more bands comprises a conformable band or band portion.

Abstract: An ultrasonic sensor comprising an ultrasonic transducer, the ultrasonic transducer comprising: a piezoelectric element; and an active electrode and a counter electrode adapted for electrical connection to the piezoelectric element; wherein the piezoelectric element, the active electrode and the counter electrode are comprised in at least part of an electrical circuit for operating the piezoelectric element; the ultrasonic sensor is mounted or configured to be mountable to an entity to be sensed; and the ultrasonic sensor is adapted such that removal of the ultrasonic sensor from the entity causes a breaking of an electrical circuit so as to render the ultrasonic sensor inoperable or irreversibly inoperable.

Abstract: An ultrasonic device, the device comprising at least one flexible ultrasonic transducer; and a clamp configured to mount the at least one transducer to a test object. Optionally, the clamp may comprise one or more bands and wherein the one or more bands can optionally be metal or at least part of the one or more bands may be formed of a conformable material such that the one or more bands comprises a conformable band or band portion.