The F77 direct detection sensor features a wide projection cone to generate a measuring range of 20 mm...250 mm, allowing reliable detection of the PCBs as they pass. The PCBs should enter the projection cone of the ultrasonic sensor at as perpendicular an angle as possible to ensure reliable reflection of the sound waves. A suitable distance between the PCB and the sensor must be calculated to eliminate the risk of raised components on the PCB falling in the sensor blind zone. Projection cone spread must be accounted for if the measuring distance is enlarged.
Ultrasonic sensors provide a dependable switching signal even when faced with reflective surfaces, which are actually excellent reflectors of sound waves. Recesses in PCBs are rendered insignificant due to the width of the sound beam. Harnessing ultrasonic technology within the new miniature design offers a combination of significant benefits.