Ultrasonic Distance Measuring System (UAS)

The ultrasonic distance measuring system (UAS) facilitates non-contact distance measuring in gaseous mediums on resounding surfaces.

Ultrasonic Distance Measuring System (UAS)

ADOR Tech, with the help of its international partners, design and manufactures an ultrasonic distance measuring system (UAS) capable of measuring non-contact distances in gaseous materials on resounding surfaces, such as metals, glass, wood, liquids, and a variety of fabrics.

Ultrasonic distance measuring is carried out according to the impulse echo method, by which the distance to the test object is calculated on the basis of the running time of an acoustic impulse from the sensor to the reflecting object and back. A pulse generator produces a short transient, which affects mechanical oscillations of the elastic electrode of a sensor, and thus transmits a directed and bunched sound wave into the adjacent medium.

That part of the sound wave, reflected from the test object and arriving back at the sensor, is again converted into an electric impulse and amplified. By means of a clock generator, the sound’s running time from transmission to the reception of the reflected impulse is separated into paces of 0,05mm air gap. The single paces are counted, evaluated, stored, and transmitted to the data interface for further processing. The meter reading held during a measuring period indicates the distance between the sensor and the test object with a definition of a max—0.05 mm air gap.

The UAS system has been designed for fitting different ultrasonic converters:

  • Sell radiator for highly accurate measurements, ± 0.1mm on short-range
  • piezoceramic sound converter for measuring longer distances (up to 10mtr)

At ADOR, as Dr. D. Wehrhahn's representative in Canada, we have integrated our engineering and commercial expertise to provide customers with tailor-made solutions. We are ready to provide technical and engineering services for sophisticated and complex necessities of every inquiry based on the skills and experience of our staff, resources, and capacities. Get in touch to discuss your requirements!

Measuring principle

The distance measurement is based on the principle of the pulse-echo method, i.e. one at a certain time t0 transmitted ultrasonic pulse hits for a dependent of the speed of sound at the time t1 on the measured object is reflected and reaches the time 2 * t1 back to the ultrasonic sensor.

The elapsed time (run time) depends on the distance between the object and the ambient temperature T. The effect of temperature is compensated by using an auxiliary reflector. The distance between the reflector and the temperature sensor is known and is hereby made the temperature compensation. Only by this compensation, it is possible to achieve accuracies of 100 microns at the UAS systems.


  • power unit 220VAC/24VDC
  • Extention lead for ultrasonic sensors with LEMOSA sockets


  • The high measurement frequency of up to 200Hz by using a micro controller
  • RS232-interface and analog current- and voltage exit
  • measurement value display on 5-digit LC-display
  • running time-dependent amplifying adjustment of ultrasonic sound
  • reset of the latest measurement value for relative measurements
  • all system parameters adjustable via the interface
  • tolerance contacts

Technical Details

Listed below are the general technical specifications of our ultrasonic distance measuring system (UAS). For the complete specifications in details, please download the catalog at the bottom of the page.

Power supply: 18 to 32 VDC; 12 V optional

Poser consumption: < 120 mA @ 24 V

Measuring method: Impulse-echo method with reference reflector

Measuring range: 70 mm to 2000 mm, measured from the sensor's front rim

Display: 5-digital LED Display


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