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Ultrasonic Sensor

As the name indicates, ultrasonic sensors measure distance by using ultrasonic waves

Ultrasonic Sensors


As the name indicates, ultrasonic sensors measure distance by using ultrasonic waves



As the name indicates, ultrasonic sensors measure distance by using ultrasonic waves. The sensor head emits an ultrasonic wave and receives the wave reflected back from the target. Ultrasonic Sensors measure the distance to the target by measuring the time between the emission and reception. An optical sensor has a transmitter and receiver, whereas an ultrasonic sensor uses a single ultrasonic element for both emission and reception. In a reflective model ultrasonic sensor, a single oscillator emits and receives ultrasonic waves alternately. This enables miniaturization of the sensor head. Because ultrasonic sensors use sound rather than light for detection, they work in applications where photoelectric sensors may not. Ultrasonic’s are a great solution for clear object detection, clear label detection and for liquid level measurement, applications that photoelectric struggle with because of target translucence. As well, target color or reflectivity does not affect ultrasonic sensors, which can operate reliably in high-glare environments.


Typical Applications

Tank Level detection Production Line Sensors Distance Measurement Liquid level control
Robotic sensing Thread or wire break detection People detection for counting Presence detection
Stacking height control Vehicle detection for car wash and automotive assembly Thru beam detection for high speed Counting


Advantages of Ultrasonic Sensors

Small size Easily integrate with any type of controller High frequency, sensitivity and power
Greater accuracy for measuring thickness and depth of a parallel surface Easy to use and not dangerous during operation An inexpensive option


Main Types of ultrasonic sensors

Ultrasonic proximity sensors Ultrasonic 2 point proximity switches Ultrasonic retro-reflective sensors Ultrasonic through beam sensors