Dakota Ultrasonics PX-7 DL User Manual
Page 13
PX-7 DL Ultrasonic Thickness Gauge
9
The Transducer
The transducer is the "business end" of the PX-7. It transmits and
receives ultrasonic sound waves that the PX-7 uses to calculate the
thickness of the material being measured. The transducer connects to the
PX-7 via the attached cable, and one coaxial connector.
The transducer must be used correctly in order for the PX-7 to produce
accurate, reliable measurements. Below is a short description of the
transducer, followed by instructions for its use.
The diagram above is a side view of a typical single element delay line
transducer. This delay line is fastened to the transducer with a retainer
ring. A drop of couplant is applied between the delay line and transducer
body. The transducer body contains one crystal element that is
responsible for conducting ultrasonic sound into and back from the material
being measured. When the transducer is placed against the material being
measured, it is the area directly beneath the delay line that is being
measured.