The HC-SR04 Ultrasonic Sensor Module is a highly reliable distance-measuring sensor widely used in robotics, automation, security systems, obstacle detection, and DIY electronics projects. Designed for accurate and stable non-contact distance measurement, this module emits ultrasonic waves at 40kHz and calculates the time taken for the echo to return, providing highly precise distance data.

It operates at 5V, offering low power consumption and excellent performance for Arduino, Raspberry Pi, ESP32, PIC, AVR, and other microcontroller platforms. With a measuring range of 2cm to 450cm theoretically and a practical stable range of 2cm to 80cm, the HC-SR04 ensures consistent readings with up to 3mm accuracy. Its narrow measuring angle of less than 15° makes it ideal for focused detection applications such as robot navigation, smart dustbins, object avoidance, tank level measurement, parking sensors, and automation systems. Compact, affordable, and easy to integrate, this ultrasonic sensor is one of the most popular components for hobbyists, students, and embedded system developers.

Features:

• Operating voltage of +5V compatible with most microcontrollers

• Theoretical measuring range from 2cm to 450cm

• Practical stable measuring distance between 2cm and 80cm

• High measurement accuracy of up to 3mm

• Narrow detection angle of less than 15° for precise targeting

• Low operating current consumption (<15mA)

• Ultrasonic frequency of 40Hz for stable distance detection

• Easy 4-pin interface: VCC, Trig, Echo, GND

• Suitable for robotics, automation, and distance measurement systems

• Quick response time with stable output

How to Use:

• Connect VCC to 5V and GND to ground

• Connect TRIG to a microcontroller digital pin configured as output

• Connect ECHO to a digital input pin

• Send a 10µs pulse to TRIG to initiate measurement

• Measure the pulse duration on ECHO to calculate distance

• Use appropriate formulas or libraries for Arduino/ESP32/Raspberry Pi

• Mount the sensor on a stable surface for best results

Product Instructions:

• Avoid placing objects too close (<2cm) for accurate readings

• Ensure sensor surface is clean and unobstructed

• Do not expose the sensor to water unless waterproof housing is used

• Use in environments free from high ultrasonic interference

• Keep the sensor aligned directly toward the target

• Ideal for indoor and controlled conditions for best performance

Specifications:

• Operating Voltage: +5V

• Theoretical Measuring Distance: 2cm – 450cm

• Practical Measuring Distance: 2cm – 80cm

• Accuracy: 3mm

• Measuring Angle: <15°

• Operating Current: <15mA

• Operating Frequency: 40Hz

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