Sensor Range New Technology Detects the Distance or Movement of Objects


Used to detect the distance or movement of objects, ultrasonic sensors have become a common device used in the medical and industrial field. The device works by emitting sound waves, manipulating the strength, frequency, and diameter depending on their application. There are several different factors that can cause inaccuracies in the device and should be noted when applying them to your business. When used correctly, the device can significantly improve production and efficiency.

Ultrasonic Sensor Range

Sounds waves travel at a near constant speed of about 323 meters per second. The device is also capable, and at many times usually, records what is known as the round-trip of a sound wave. The round-wave means that the sound wave has traveled to the required object twice before being detected by the sensor. Essentially the round-trip records the distance from the sensor to the object and back. Ultrasonic sensors can be applied to several different ranges, however can usually be split up into two categories: high frequency and low frequency.

Low frequency waves travel further than higher frequency sound waves due to the fact that they are not affected nearly as much by external factors such as dust and humidity. High frequency sound waves, though affected by external factors, have a higher resolution and better accuracy than low frequency waves. When considering which type of sensor is best for you, make sure you do not choose a sensor merely on the maximum sensing range for the device, for this will often result in skewed, inaccurate results.

Factors to Consider

Aside from choosing the range of your ultrasonic pressure sensor, a sensor’s performance and overall quality is also contingent on several other factors such as beam spread, sensor range, undetectable objects and the sensitivity of objects, and environment.

Beam Spread

All sensors have what is known as the beam spread, or the width of a device’s sensing range. It is important to find a suitable range when configuring your beam spread due to the fact that the larger a beam spread is the more heightened is its susceptibility to unwanted electrical noise as well as detecting undesirable objects, creating more work on honing on the desired object, decreasing efficiency.

Sensor Range


Aforementioned, it isn’t pragmatic to select and operate with a device based on its sensing range because it will not always give you the best result. However, in addition to this, when a desired range is found in a sensor, it is important to choose a sensor that has a range that exceeds the range desired. Running a sensor at a lower setting increases the longevity of the device because it isn’t being run at full capacity while also giving positive, accurate results.

Object Detection and Sensibility

Some objects may not be detected by an ultrasonic sensor due to its positioning or shape, for example. The sound wave of the device is able to reach the object and bounce off of it, however may not be deflected in the direction to go back to the sensor to be recorded accurately. Objects may also be too small to be able to be picked up by sound waves thus making them untraceable. Aside from size, some objects can absorb sound waves all together, making them impossible to detect. Some examples of these objects are wool and fabric cloths and carpeting. On the other hand, objects such as metal, can amplify the effect of sound waves, making them a very easy object to detect and record.


Although the speed of sound is usually falls at the 323 meters per second mark, there are environmental factors that can change this, making the environment of where a sensor is placed important. Very cold and hot as well as the humidity of an environment can have an adverse effect on sensors and sound waves, skewing the results.

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