Re S.p.A. US3
Rev.12/04/11 2/23
Ultrasonic sensor advantages
Ultrasonic sensors are extremely advantageous in comparison with other sensor types:
They are able to “see” any non-sound-absorbent material and some kinds of sound-absorbent
materials.
Material colour has no effect on reading.
Target object surface has no effect on reading.
Ultrasonic sensors work in most environmental conditions (e.g. foggy, dusty, dirty, brightly lit, and
very dark).
Ultrasonic sensors are able to read transparent materials.
Ultrasonic sensors are able to ignore background disturbances.
Ultrasonic sensor limitations
They are not suitable for detecting materials particularly good at absorbing sound.
They have a relatively low propagation speed, limiting the sensor reading speed.
They do not work in water, in high pressure or vacuum environments.
They may be affected by the presence of nearby ultrasound sources (e.g.: other ultrasonic sensors or
compressed air guns).
Typical applications
Laminated materials tension control.
Winding and unwinding converting industrial machinery roll diameter measurement (cutter,
rotogravure, cutting and winding machines, wrinkling machines).
Diameter roll measurement for positioning and working phase starting.
Diameter reel measurement (aluminium and sheet).
Distance measure.
Box inside liquid level measurement.
Full and empty box recognition.
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