SRF05 Ultrasonic Distance Sensor (1~400cm)

SRF05 Ultrasonic Distance Sensor is a compact ultrasonic ranging module designed for accurate obstacle detection and distance measurement in embedded electronics and robotics systems. This ultrasonic ranging unit extends the classic SRF04 sensing capability, delivering measurement distances from as close as 1 cm up to 4 meters. Operating at a 40 kHz ultrasonic frequency, this distance measurement module emits sound pulses and calculates range using echo timing. The sensor board easily interfaces with common microcontrollers including Arduino, making this ultrasonic measurement module a practical solution for robotics navigation, automation experiments, and interactive electronics projects.

Extended Measurement Range with High Sensitivity

This ultrasonic distance detection module expands sensing capability beyond earlier SRF04 designs, increasing the measurable range from 3 m to 4 m while also improving the minimum detectable distance to just 1 cm. Operating with narrow side lobes and a focused ultrasonic beam, this precision ranging sensor can detect small cylindrical objects such as a 3 cm diameter handle at distances beyond 2 meters. Such sensitivity enables reliable obstacle detection and environmental awareness for mobile robots, automation systems, and smart sensing installations.

Simple Microcontroller Integration

This ultrasonic echo‑based sensor module uses a straightforward trigger-and-echo signal interface compatible with standard TTL logic. A minimum 10 µs trigger pulse initiates ultrasonic transmission, while the returned echo pulse width represents the measured distance. Such a simple digital interface allows this robotic ranging sensor to connect directly with common development boards and microcontrollers without complex circuitry. The compact ultrasonic measurement board therefore suits rapid prototyping, embedded control experiments, and educational electronics platforms.

Reliable Obstacle Detection for Robotics

This ultrasonic obstacle detection board functions similarly to biological sonar used by bats, emitting sound waves and analyzing reflections to determine surrounding distances. Such capability enables robotic platforms to sense nearby objects and dynamically adjust movement. Combined with simple control code, this robotic proximity detector supports precise motor control, allowing autonomous vehicles or smart robots to avoid collisions and navigate complex environments with accurate distance feedback.

Applications include robotics obstacle avoidance, environmental distance measurement, interactive installations, and educational electronics experiments. This ultrasonic sensing module provides accurate range data that can guide motion control systems, trigger automation responses, or support sensor‑driven robotics projects requiring reliable short‑to‑medium distance measurement.

Basic Parameters