HC-SR04 Ultrasonic Distance Sensor Module

The HC-SR04 Ultrasonic Distance Sensor Module is a reliable and widely used distance measurement module designed for non-contact object detection and distance sensing applications. Operating at 40kHz ultrasonic frequency, the sensor measures distance by transmitting ultrasonic waves and calculating the time taken for the reflected signal to return after striking an object. This allows accurate distance detection without any physical contact with the target surface.

With a measurement range of 2cm to 400cm and accuracy up to ±3mm, the HC-SR04 is ideal for robotics, automation systems, obstacle avoidance projects, and smart electronic applications. Compatible with Arduino, ESP32, Raspberry Pi, NodeMCU, STM32, and other development platforms, its compact size, low power consumption, and simple interface make it suitable for students, hobbyists, and professional embedded system projects.

Technical Specifications

• Module: HC-SR04 Ultrasonic Distance Sensor
• Operating Voltage: 5V DC
• Operating Current: 15mA
• Working Frequency: 40kHz
• Measurement Range: 2cm – 400cm
• Measurement Accuracy: ±3mm
• Detection Angle: Approximately 15°
• Trigger Input Signal: 10µs TTL Pulse
• Echo Output Signal: TTL Pulse Width proportional to distance
• Interface Pins: VCC, Trigger, Echo, GND
• Communication Type: Digital Pulse Output
• Compatible Platforms: Arduino, ESP32, Raspberry Pi, NodeMCU, STM32
• Operating Temperature: -15°C to +70°C

Package Includes

• 1 × HC-SR04 Ultrasonic Distance Sensor Module

Features

• Non-contact ultrasonic distance measurement
• High accuracy up to ±3mm
• Measurement range from 2cm to 400cm
• 40kHz ultrasonic operating frequency
• Simple 4-pin interface design
• Fast and stable response time
• Low power consumption
• Easy interfacing with development boards
• Compact and lightweight design
• Reliable object detection capability
• Compatible with Arduino and ESP boards
• Ideal for robotics and automation projects
• Easy integration into DIY electronics projects
• Suitable for educational and prototyping applications

Applications

• Obstacle avoidance robots
• Distance measurement systems
• Robot navigation projects
• Smart parking systems
• Water level monitoring systems
• Automatic door systems
• Industrial automation projects
• Security and alarm systems
• Smart dustbin projects
• IoT and embedded applications
• DIY electronics projects
• Educational and prototyping applications

Dimensions

• Length: 4.5 cm
• Width: 2.0 cm
• Height: 1.5 cm
• Weight: Approx. 8.5g