HC-SR04 Ultrasonic distance detection module

Item number 10037 Share
HC-SR04 Ultrasonic distance detection module

Description Links

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


Brand information
Brand Opencircuit house brand
Connection data
Voltage 5 V
Current 2 mA
Size info
Length21 mm
Width45 mm
Height15 mm
Weight9,1 g
€ 2,25€ 1,85 Excl. VAT (NL)
Expected delivery date: Tuesday 28 May. ... pieces in stock Hot item
Show volume discounts Shipped from € 3,50 (NL) 30 days cooling-off Excellent service
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Customer Reviews

The Netherlands
I used the HC-SR04 for a distance measuring project and it works surprisingly well!
Placed on 
The Netherlands
Cheap Easy in use Large detection cone Above 2m inaccurate
Classic, and fun to explain pin interrupts with. Sound cone is quite wide, picks up just a little too much in my opinion and quite inaccurate from 2m. Technically somewhat outdated now that there are time-of-flight laser sensors like this one: https://opencircuit.nl/product/vl53l1x-time-flight-distance-sensor-carrier . But it is also 5x as expensive.
Placed on 
The Netherlands
Old acquaintance.
Placed on 
The Netherlands
Works very well, fairly easy to program
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