Attributes

Brand	-
Category	Robotics / STEM Teaching Tools / Sensors
Origin	-
Operating Voltage	DC 5V
Static Current	< 2mA
Measuring Angle	15 degrees
Measuring Range	2cm - 400cm
Resolution	0.3cm
Trigger Input Signal	10µS TTL pulse
Echo Output Signal	TTL level signal proportional to distance
Dimensions	45mm x 20mm x 15mm
Mounting Hole Diameter	2mm
Compatibility	Arduino, Raspberry Pi, STM32

6 reviews

Anonymous

Mar 31, 2026

Rating: 5/5

Perfect for Arduino Projects

This HC-SR04 module works flawlessly with my Arduino Uno. The range is accurate up to about 3 meters in my testing, which is perfect for my robot obstacle avoidance project. Very easy to wire and code.

Anonymous

Mar 30, 2026

Rating: 4/5

Solid standard sensor

The industry standard for a reason. It's cheap, durable, and gets the job done for most non-critical ranging tasks. The 5V logic level makes it compatible with most microcontrollers without extra components.

Anonymous

Mar 23, 2026

Rating: 5/5

Reliable and Consistent

Bought a pack of ten for our workshop. All of them tested working immediately out of the box. The response time is fast enough for real-time applications. Highly recommended for educational purposes.

Anonymous

Mar 15, 2026

Rating: 3/5

Works but has limitations

It does what it says, but don't expect industrial precision. There is a bit of noise in the data if you don't average multiple readings. Good for hobbyists, maybe not for critical navigation systems.

Anonymous

Mar 08, 2026

Rating: 4/5

Good value but sensitive to angle

Great sensor for the price. It works well for basic distance measurement. Just note that the object needs to be relatively perpendicular to the sensor for the best readings; angled surfaces sometimes give erratic results.

Anonymous

Mar 01, 2026

Rating: 5/5

Easy to get started

As a beginner, I was worried about wiring this up, but there are tons of tutorials online. It took me less than 10 minutes to get the first distance reading on my serial monitor. Great product!

5 FAQ

Q: Can this sensor work with a 3.3V microcontroller like the ESP32?

A: Yes, but you need a voltage divider or a logic level converter for the Echo pin, as the module outputs 5V signals which can damage 3.3V GPIO pins. The Trigger pin usually accepts 3.3V as high.

Q: How do I handle the blind zone at close range?

A: The blind zone is inherent to ultrasonic technology. In your code, you should ignore any readings below 2cm or implement a delay after triggering to allow the sound wave to settle before listening for the echo.

Q: Does this come with jumper wires?

A: No, this listing is for the module only. Jumper wires are sold separately, but standard female-to-female Dupont wires work perfectly with the header pins.

Q: What is the minimum distance this module can detect?

A: The minimum measurable distance is approximately 2cm. Objects closer than this may not be detected reliably or may return a constant low value.

Q: Is this waterproof for outdoor use?

A: No, the standard HC-SR04 is not waterproof. If you plan to use it outdoors, you must house it in a waterproof enclosure with a mesh cover that allows sound to pass, or look for a specifically rated waterproof ultrasonic sensor.

Explore your interests

STC32G12K128 STC8H8K64U Microcontroller Small System Core Board Development Board Emulator

$16.50

Youxin Electronics_STM32H743IIT6 Core Board System Board Learning Board STM32 Development Board

$118.00

Arduino DUE Development Board 32-bit ARM Controller A000062 Italian Official Original Import with Cable

$299.00

Photoresistor Module Brightness Automatic Control DC5V 12V Light-Control Relay Light Switch Sensor Induction

$8.41

Serial SHT20 Chip Temperature and Humidity Sensor Test, SHT30 Chip Measurement and Monitoring Module by Viter Intelligence

$11.00

High-Speed Yabo Smart Raspberry Pi 4B Motherboard Development Board Accessories RaspberryPi 2G/4G/8G RAM Py

$494.30

Magnetic Circular Counting Chips, Two-Sided Flip Coins for Elementary Math, Kindergarten Early Education, Ten-Frame Matrix, Addition/Subtraction within 10 & 20, Teaching Tools

$11.90

HC-SR501 Human Motion Infrared Sensor Module Compatible with Arduino micro:bit Eco-Friendly

$7.50

SANSI White Label Class A Glass Graduated Cylinder C18 Micro-Precision Demulsification Cylinder with Scale Measurement Includes Certificate Ground Joint Stopper Hexagonal Bottom Borosilicate Glass Lab Equipment

$3.68

EV2400 Battery Unlock Fuel Gauge Programmer MSP430 HPA500 Evaluation Module Interface Board SMBus

$323.00

Cube Three-View Teaching Aid with Grid - 3D Geometry Observation Tool for Grades 4-5 Math (2cm Cubic Blocks Set)

$15.10

OrangePi Orange Pi Zero3 Zero 3 Development Board Allwinner H618 Orange Pi

$228.00

Zave MAX30100 MAX30102 Module for Blood Oxygen, Wrist Heart Rate, Pulse, and Heartbeat Detection

$3.39

12V Stable Version Light-Control Switch No-Light Sensing with Extension Cable Photoresistor Plus Relay Module

$49.20

STM32 Smart Car 51 Microcontroller Arduino Obstacle Avoidance Chassis Kit Mecanum Wheel Robot Car

$40.80

Tech Small Production Small Invention DIY Piano Electronic Keyboard Real Playable Science Small Handmade DIY Materials

$33.00

[Youxin Electronics] GP2Y0E03 Infrared Distance Sensor Module 4-50cm Range

$23.65

Transparent 3D Geometric Model Perspective Decomposition Graphic Teaching Aid, Complete Set for Elementary Grades 1-6 Math

$6.80

DHT22 Single-Bus Digital Temperature & Humidity Sensor AM2302 Module Electronic Building Blocks

$10.42

E18-D80NK Infrared Photoelectric Switch Diffuse Reflection Obstacle Avoidance Sensor Module 3-80CM

$12.60

LAN8720 Module Network Module Ethernet Transceiver RMII Interface Development Board Xinwei Electronics

$7.85

STC15W408AS Core Board Minimum System Board 51 Microcontroller Development Board TTSOP20 Learning Board

$18.47

New Version MEGA2560 R3 Development Board, Improved MEGA2560 R3 with Sensor Expansion Board

$13.68

Gradient Visual Illusion Kit: Electric Rotating Assembly Toy for Maker DIY, Paintable Handmade Model

$8.72

51/AVR Microcontroller Core Development Board STC89C52RC/51MCU Experiment Board/ATMEGA32 Learning Board

$37.90

[Trial Pack] Xianlang Complete Cat Treat Sticks Meal Packs Main Course Cans Freeze-Dried Cat Food Sample Snacks Gift Set

$15.00

GY-30 302 Digital Light Intensity Illuminance Sensor BH1750FVI Module Light Sensor Ball

$7.41

Foldable Clothes Drying Rack Floor Standing Home Balcony Bedroom Hanging Clothes Quilt Drying Artifact Outdoor Cooling Rod Indoor Drying Rack

$47.10

Metal Detector Module Non-Contact Metal Induction Sensor Detection Module Metal Detector

$8.70

RV1103 Miniature Linux Development Board: RISC-V Vision and AI with Ethernet Port

$53.10

For Arduino Development Board R3 Mainboard Microcontroller Module Kit Programming Learning Board Sensor Suite

$78.00

Xuefen Geometry Stamping and Tracing Set for Grades 1-2, 3D and 2D Ink Pads, Math Learning Tools, Cube and Cuboid Models

$4.51

Rubber Tire Toy 4WD Smart Car Wheels Car Model Robot Accessories (Suitable for 2mm Axle)

$0.50

E18-D80NK Infrared Obstacle Avoidance Sensor Proximity Switch Smart Robot Car 10-80cm

$6.30

OPT3001/3002/3004 Ambient Light Sensor Module Measures Visible Light Density Digital Optical Sensor

$8.14

51 MCU Minimum System STC89C52 DIP40 Through-Hole Smart Car Main Control Board Learning Experiment

$19.80

Outdoor Adventure Kids' Insect Observation Box with Magnifying Glass, Boys & Girls Toy for Exploration, Butterfly Catching and Fish Scooping Tools

$7.80

Risym Laser Head Sensor Module Suitable for Laser Module Expansion Board Laser Sensor Development Board

$2.82

Freeze-Dried Chicken Treats for Dogs: Nutritious Weight-Gain Breast Meat Chunks for Puppies – Teeth Cleaning, Grain Mixing, Universal Use

$3.90

Soil Moisture Sensor Probe Soil Moisture Meter Detection Module Sensor Separate Probe

$2.39