Attributes

Brand	-
Category	Robotics / STEM Teaching Tools / Sensors
Origin	-
Operating Voltage	5V DC
Static Current	< 2mA
Output Signal	Electric Level Signal (High/Low)
Ranging Distance	2cm - 400cm
Resolution	0.3cm
Measurement Angle	15 degrees
Trigger Input Pulse	10uS TTL pulse
Dimensions	45mm x 20mm x 15mm
Pin Count	5 Pins (VCC, Trig, Echo, GND, OUT)
Compatibility	Arduino, Raspberry Pi, STM32, ESP32

6 reviews

Anonymous

Mar 29, 2026

Rating: 5/5

Perfect for Arduino Robotics

This sensor works flawlessly with my Arduino Uno project. The ranging is accurate up to about 3 meters in my tests, and the 5-pin layout makes wiring very straightforward. Great value for the price.

Anonymous

Mar 23, 2026

Rating: 4/5

Great range for the size

Impressed by how compact it is while still reaching the advertised 400cm. It struggles slightly with soft fabrics absorbing the sound waves, but that is physics, not a defect. Works great on hard surfaces.

Anonymous

Mar 20, 2026

Rating: 5/5

Reliable and Durable

We bought ten of these for our workshop kits. They have survived multiple drops by students and still calibrate perfectly. The response time is fast enough for real-time applications.

Anonymous

Mar 16, 2026

Rating: 5/5

Easy to integrate

Found plenty of libraries online that support this specific HY-SRF05 model immediately. Setup took less than 10 minutes. Highly recommend for beginners starting with ultrasonic sensors.

Anonymous

Mar 10, 2026

Rating: 5/5

Best budget sensor

Compared to other brands, this one offers the best consistency. The echo pulse width corresponds accurately to distance. No issues after two months of continuous operation in my smart parking prototype.

Anonymous

Mar 02, 2026

Rating: 4/5

Good accuracy, needs stable power

The module performs well for obstacle avoidance robots. I noticed some jitter in readings when powered directly from a weak USB port, but adding a capacitor fixed it. Solid component for learning.

5 FAQ

Q: What is the minimum detection distance?

A: The minimum reliable detection distance is approximately 2cm. Objects closer than this may not be detected accurately due to the ringing effect of the transducer.

Q: Is this sensor waterproof for outdoor use?

A: No, this module is not waterproof. It is designed for indoor use or protected enclosures. Exposure to rain or high humidity may damage the electronics.

Q: How do I calculate the distance from the echo pulse?

A: Distance (cm) = (Duration of high-level pulse in microseconds) / 58. Alternatively, Distance (inches) = Duration / 148. This formula accounts for the speed of sound.

Q: Does this come with jumper wires included?

A: No, the package includes only the HY-SRF05 module itself. Jumper wires are sold separately or as part of our starter kits.

Q: Can this sensor be used with a 3.3V logic microcontroller like ESP32?

A: Yes, but since the module operates at 5V, you should use a voltage divider or a logic level converter for the Trig and Echo pins to safely interface with 3.3V systems.

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