Description
Reviews
| 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 |
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.
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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