HC-SR04 ultrasonic distance sensor module, up to 2 m range, 5 V meter for Arduino

HC-SR04 ultrasonic distance sensor for Arduino, ESP8266, ESP32, and Raspberry Pi

The HC-SR04 distance sensor is a versatile measuring device that works well with popular microcontroller platforms. The module uses the proven principle of emitting ultrasonic waves and precisely measuring their echo return time. This allows very accurate real-time distance measurement to obstacles.

Key technical features

The module offers a wide measuring range from 2 cm to 500 cm, with an optimal beam angle of about 15 degrees. Supply voltage is standard 5V, and the transducers operate at 40 kHz. With current draw below 2 mA, the sensor is highly energy-efficient and easy to integrate.

Specifications

• Supply voltage: 5V
• Operating frequency: about 40 kHz
• Measuring range: 2 cm to 500 cm
• Beam angle: about 15 degrees
• Current consumption: <2mA
• Pin pitch: 2.54 mm
• Dimensions: 46 x 21 x 15 mm

Example applications

• Autonomous mobile robots with obstacle avoidance
• Home alarm systems and simple motion detectors
• Touchless smart trash cans
• Liquid or bulk level gauges in tanks
• Educational radar and spatial scanner projects

Benefits

• High accuracy and stable measurement across a wide distance range
• Full compatibility with the most popular development boards
• Low power consumption for longer battery-powered project runtime
• Simple operating principle and easy integration with custom software
• Compact size for straightforward mounting in enclosures