Ultrasonic HY-SR05 Range Finding Sensor

Measure distances accurately and reliably with the HY-SRF05 Ultrasonic Ranging Sensor Module. An evolved, high-performance successor to the classic HC-SR04/HY-SR04, the SRF05 version delivers extended detection ranges up to 4.5 meters, sharper accuracy, and upgraded onboard signal filtering for clean, noise-free sonar readings.

Designed with a flexible 5-pin header interface, the HY-SRF05 offers backwards compatibility with standard dual-pin (Trig/Echo) code libraries while introducing a single-pin mode that combines trigger and echo operations on a single GPIO line. This makes it an essential choice for space-constrained projects on Arduino, ESP32, ESP8266, Raspberry Pi, STM32, and Single-Board Computers (SBCs).

Key Upgrades Over SRF04 / HC-SR04

• Extended Detection Range: Accurately measures distances from 2 cm up to 4.5 meters with a sub-centimeter resolution.

• Dual Operation Modes: Supports traditional 2-pin Trig/Echo wiring or 1-pin shared GPIO mode (via the OUT pin) to save microcontroller pin space.

• Superior Noise Suppression: Upgraded driver circuitry provides faster signal processing and reduces false echo triggers.

• Universal 3.3V / 5V Logic Support: Easily pairs with 5V microcontrollers directly or 3.3V IoT platforms using basic voltage dividing resistors or logic level converters.

Applications

• Robotic Obstacle Avoidance: Enable autonomous rovers and drones to navigate obstacles seamlessly.

• Liquid Level & Tank Metering: Measure non-contact fluid heights in water tanks and reservoirs.

• Distance & Proximity Sensing: Build digital tape measures, parking sensors, and automated security barriers.

Technical Specifications