Ultrasonic sensors detect all sound-reflecting objects and measure the time between sending and receiving a reflected sound signal The target’s colour, transparency and surface are irrelevant.
|Object / Application||Ultrasonic sensor||ToF distance sensor||Photoelectric
|Objects with holes|
|Different colour targets|
|Level irregular objects
|Long range (>1m)|
|Angle to target|
Blister packs, PET bottles or transparent plastic bowls in the food industry can be reliably detected using ultrasonic sensors.
As opposed to photoelectric sensors, the target’s colour, transparency and surface reflectivity do not affect sensing. The wide beam allows reliable detection, even of mesh objects.
The vibration of the sound transducer reduces the deposit of dust. The sensors operate reliably even with light soiling and can be used in applications where photoelectric sensors reach their limits.
In all kinds of applications, ranging from batch height monitoring of cardboard boxes to “empty” detection of shiny plastic labels, ultrasonic sensors provide reliable and continuous signals. For example, the M18 type sensor offers a particularly small blind zone and long sensing ranges which are usually only achieved by sensors of a considerably larger design.
Opting for an IO-Link version of ifm’s ultrasonic sensors offers the following benefits: