HC-SR04 Ultrasonic distance detection module

Item number 10037 Share
HC-SR04 Ultrasonic distance detection module
€ 2,60€ 2,15 Excl. BTW (NL)
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The HC-SR04 module measures distance to objects by means of ultrasonic reflection. This is done by firing pulses of 40 kHz to the environment, after which the time required to receive the reflected signals is measured. By dividing this time by a constant, the distance can be determined fairly precisely (up to 0.3 cm precision!). Works with all hard surfaces (the sound must be able to be reflected).

  • Voltage: 5V
  • Current: <2 mA.
  • Output: Digital, high 5V, low 0V.
  • Sensor angle: around 15 degrees.
  • Detection distance: 2 cm - 450 cm (measurable with; pulse width (uS) / 58 = distance (cm).
  • Precision: up to 0.3 cm
  • Input trigger signal: 10us high
  • Echo signal: High for x uS


Current 2 mA
Spanning 5 V

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Customer Reviews

The Netherlands
Cheap Easy in use Grote detectiekegel Boven 2m onnauwkeurig
Klassieker, en leuk om pin-interrupts mee uit te leggen. Geluidskegel is vrij breed, pikt net iets te veel op naar mijn idee en vanaf 2m behoorlijk onnauwkeurig. Technisch enigszins achterhaald nu er time-of-flight lasersensoren zijn zoals deze: https://opencircuit.nl/product/vl53l1x-time-flight-distance-sensor-carrier. Maar die is dan ook 5x zo duur.
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The Netherlands
Old acquaintance.
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The Netherlands
Works very well, fairly easy to program
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The Netherlands
Works fine
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The Netherlands
I use this sensor in my rain reservoir to measure the level of rain water and the humidity is apparently a problem. The measurement fails after a few months. The interior works fine.
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