What is an Ultrasonic Sensor?

In this article, find out what an ultrasonic sensor is and how it works. Treotham Automation is a leading Australian provider of products and components for the industrial automation sector.

Operating for over 25 years, we are industry experts and pride ourselves on providing high quality, cost effective solutions based on the latest technology for our customers. 

Below we answer the most commonly asked questions about ultrasonic sensors including what is an ultrasonic sensor?, How does an ultrasonic sensor work? and what is the function of an ultrasonic sensor? 

What is an Ultrasonic Sensor?

An ultrasonic sensor is a device that emits ultrasonic sound waves to measure the distance to an object.ultrasonic reflex sensor

Our range of ultrasonic sensors include products by Wenglor which has been developing individual market solutions in the field of sensor technology for 30 years.

Wenglor ultrasonic sensors are almost completely insensitive to interfering factors (e.g. extraneous light, dust, smoke, lint), they are easy to use and have excellent technical properties.

The Wenglor ultrasonic sensor product ranges we supply to the Australian market are: 

What is the Function of an Ultrasonic Sensor?

The function of an Ultrasonic sensor varies depending on the application but includes some of the following examples: ultrasonic sensor

  • Distance, position and slack monitoring
  • Collision protection
  • Fill level measurement
  • Measuring stacking height
  • Quality testing
  • Sag control for sheet products
  • Presence monitoring
  • Distance & collision protection
  • Detection of dark objects
  • Object selection
  • Steel coil measurement

How does an Ultrasonic Sensor Work? 

An ultrasonic sensor works by emitting pulsed ultrasonic waves of a certain frequency (above the range of human hearing) to determine the object’s distance. The distance to the object from the sensor is calculated by measuring the time it takes for the sound emitted from the sensor to bounce back and be received from the object. The calculation used to determine the measurements is as follows:

D = ½ T x C (D = distance, T = time, C = the speed of sound ~ 343 meters/second). 

Speak to an Ultrasonic Sensor Expert

Want to know more about ultrasonic sensors? Contact our team of experts today. 


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