• HC-SR04 ultrasonic sensor module for Arduino and Raspberry Pi, featuring high precision distance measurement.
  • HC-SR04 Ultrasonic Sensor Module for Arduino and Raspberry Pi, accurate distance measurement, stable performance.
1 2

HC-SR04 Ultrasonic Distance Sensor for Arduino & Raspberry Pi

HC-SR04 Ultrasonic Distance Sensor for Arduino & Raspberry Pi

🔥 56 sold•✓ In stock
HK$20.00
HK$20.00
Sale Sold out
Shipping calculated at checkout.

Delivery Options

  • Local delivery within Hong Kong and in-store pickup.​
  • Free shipping for orders of HK$400 or above; HK$35 shipping fee for orders below HK$400.​
  • Shipped by SF Express, usually dispatched the same day for orders confirmed before 6:00 PM (Mon–Sat).​
  • Estimated delivery time: 1–3 business days after dispatch (Hong Kong).​
  • In-store pickup details (location and time) will be confirmed by email or phone message.​
  • Delivery times are estimates and may be affected by weather or unforeseen circumstances.​

Add precise "eyes" to your Arduino, Raspberry Pi, or robotics project with the HC-SR04 Ultrasonic Distance Sensor. This module is renowned for its stable performance and high accuracy, making it an excellent choice for non-contact distance measurement, object avoidance, and liquid level detection.

It offers a wide detection range from 2cm to 4.5 meters with an impressive precision of up to 0.3cm. It even handles super-close "blind spots" (3cm), ensuring you get reliable data.

Key Features:

  • High Precision: Ranging accuracy can reach up to 0.3cm for stable, reliable data.
  • Wide Range: Detects distances from 2cm all the way to 450cm (4.5 meters).
  • Minimal Blind Spot: A small 3cm blind spot makes it highly effective for close-proximity detection.
  • Broad Compatibility: Works perfectly with Arduino, Raspberry Pi, and other 5V microcontrollers.
  • Low Power Consumption: Quiescent current is less than 2mA, ideal for battery-powered projects.
  • Focused Detection: A sensing angle of 15 degrees helps to measure objects directly in front of the sensor.

How It Works:

  1. Trigger: Supply a high-level signal of at least 10us (microseconds) to the Trig pin.
  2. Transmit: The module automatically sends out eight 40kHz ultrasonic square waves.
  3. Receive: The module automatically detects if a returning pulse signal is received.
  4. Output: If a signal returns, the Echo pin will output a high-level signal. The duration of this high-level signal is the total time from transmission to reception.
  5. Calculation: Distance = (High-Level Time $\times$ Speed of Sound (340m/s)) / 2

Product Specifications:

  • Working Voltage: DC 5V
  • Quiescent Current: < 2mA
  • Output Signal: High level 5V / Low level 0V
  • Sensing Angle: $\le$ 15 degrees
  • Detection Range: 2cm - 450cm
  • Pinout: Vcc, Trig, Echo, Gnd
View full details