Ultrasonic distance sensor US-020 2-700cm

Ultrasonic transducer operating in the range 2 - 700 cm Power voltage of 5 V. the Output is a signal whose duration is proportional to the measured distance.

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Price 15,90 zł



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Ultradźwiękowy czujnik odległości SR04 z wyjściem częstotliwościowymSpecification

  • Supply voltage: 5 V
  • Average current consumption: 3 mA
  • Measuring range: 2 - 400 cm
  • Accuracy: 0.3 cm + 1 %
  • Angle: < 15°
  • Output: frequency signal
  • Working frequency: 40 kHz
  • Dimensions: 45 x 20 x 15 mm





The manufacturer indicates that the sensor operates in the range from 4 cm to 700 cm Of our test shows that it behaves correctly in the range from 4 cm to 400 cm Module is powered by 5 volts, the output signal, the duration of which is proportional to the measured distance. For the service module available in library for users of Arduino.


The product is compatible with Arduino

Library and connection diagram with Arduino you can find at this address.


Method of application

To begin the measurement, you must specify the TRIG output pulse voltage (high state of 5 V) 10 uS. The module measures distances using sound waves with a frequency of 40 kHz. The controller sends a signal, which distance depends on the duration of high standing, and it can be calculated by the formula:

test distance = (high level time × velocity of sound (340m/s) / 2


  • test distance - the distance is measured
  • high level time - duration of state high
  • velocity of sound - velocity of propagation of sound waves in air is 340 m/sec


To get the result in mm, we can use the formula:

distance [mm] = ( high level time x 34 / 100 ) / 2


The measurement procedure is shown in the figure below.



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The table presents available forms of delivery in Poland


Carrier and

Bank wire

by cash


Poczta Polska

terms of service

9,90 PLN17,90 PLN1-3 days

Kurier GLS

terms of service

14,90 PLN22,90 PLN

1-2 days

Paczkomaty 24/7 

terms of service

12,90 PLN-1-3 days

If the amount to pay for products exceeds 500 PLN
Delivery is for free!


  • Free delivery of orders over 500 PLN does not apply to parcels addressed outside of Poland.
  • Free delivery does not apply when changing orders.
  • The delivery period is counted in working days from the date of dispatch of the order.