Attributes

Brand	-
Category	Robotics / STEM Teaching Tools / Sensors
Origin	-
Model Options	HC-SR04, US-100, US-015
Operating Voltage	DC 5V
Static Current	< 2mA
Measuring Range	2cm - 400cm
Resolution	0.3cm
Measuring Angle	15 degrees
Trigger Input Signal	10µS TTL pulse
Interface Type	4-Pin (VCC, Trig, Echo, GND)
Dimensions	45mm x 20mm x 15mm
Compatibility	Arduino, Raspberry Pi, STM32, ESP8266

6 reviews

Anonymous

Mar 24, 2026

Rating: 5/5

US-100 version has extra features

I specifically ordered the US-100 model because it supports UART mode in addition to the standard trigger/echo mode. This saved me GPIO pins on my project. Highly recommended for advanced users.

Anonymous

Mar 23, 2026

Rating: 5/5

Great for learning embedded systems

Bought a pack of five for my university lab. All units worked out of the box. The documentation online is plentiful, making it very easy for beginners to get started with ultrasonic ranging.

Anonymous

Mar 19, 2026

Rating: 4/5

Good sensor, check your voltage

Works well for obstacle avoidance. Just remember this is a 5V module, so if you are using a 3.3V microcontroller like some ESP boards, you need a logic level converter. Otherwise, it performs as expected.

Anonymous

Mar 08, 2026

Rating: 5/5

Perfect for Arduino robotics projects

I bought the HC-SR04 version for my line-following robot. The distance readings are consistent and easy to interface with Arduino using standard libraries. Great value for the price.

Anonymous

Mar 04, 2026

Rating: 5/5

Fast shipping and good packaging

The modules arrived well-protected in anti-static bags. I tested the HC-SR04 immediately, and the accuracy within the 2cm to 400cm range is impressive for such a low-cost component.

Anonymous

Mar 02, 2026

Rating: 4/5

Reliable but sensitive to angle

The sensor works great for detecting walls and large objects. However, be aware that soft materials or angled surfaces can absorb or deflect the sound waves, leading to occasional missed readings. Typical for ultrasonic tech.

5 FAQ

Q: What is the difference between HC-SR04 and US-100?

A: While both perform ultrasonic ranging, the US-100 offers additional functionality including UART serial communication and temperature compensation for higher accuracy. It also allows selection between 3.3V and 5V logic levels via onboard jumpers.

Q: Does this work underwater?

A: No, these modules are designed for air usage only. Ultrasonic waves behave differently in water, and the electronics are not waterproof. Submerging them will damage the sensor.

Q: Is there a library available for Python?

A: Yes, if you are using a Raspberry Pi, popular libraries like 'gpiozero' have built-in support for the HC-SR04. For other platforms running Python, you can easily write a script using the RPi.GPIO or similar packages to handle the timing pulses.

Q: How many sensors can I connect to one Arduino Uno?

A: You can connect multiple sensors limited only by the number of available digital I/O pins. Each sensor requires two pins (Trigger and Echo). If you run out of pins, you can multiplex the Trigger lines or use software serial libraries.

Q: Can I use this directly with a Raspberry Pi 4?

A: The HC-SR04 operates at 5V logic levels, while the Raspberry Pi GPIO pins are 3.3V. You must use a voltage divider or a logic level converter on the Echo pin to prevent damaging your Pi. The US-100 module can be configured for 3.3V operation via jumper caps.

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

Waterproof Ultrasonic Ranging Module / Dual-Probe Ranging / JSN-SR04T / 0 Blind Zone Robot Obstacle Avoidance

$28.00

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