Attributes

Brand	-
Category	Electronic Components / Maker DIY / DIY Kits & Electronic Building Blocks
Origin	-
Operating Voltage	DC 3.3V - 5V
Current Consumption	15mA (Working),
Measuring Range	2cm to 400cm
Resolution	0.3cm
Measuring Angle	15 degrees
Trigger Input Signal	10µS TTL pulse
Echo Output Signal	TTL level signal proportional to distance
Dimensions	45mm x 20mm x 15mm
Connector Type	4-Pin Header (VCC, Trig, Echo, GND)
Compatibility	Arduino, Raspberry Pi, STM32, ESP8266/ESP32

6 reviews

Anonymous

Mar 24, 2026

Rating: 4/5

Good for low altitude sensing

Using this on a small DIY drone for altitude hold. It responds quickly enough for slow movements. Just remember it doesn't work well over soft surfaces like carpets or foam due to sound absorption.

Anonymous

Mar 22, 2026

Rating: 5/5

Reliable and robust

I've bought ten of these for a workshop class. All of them worked out of the box. The wide voltage range is a nice feature if you are switching between 3.3V and 5V logic boards.

Anonymous

Mar 22, 2026

Rating: 4/5

Great value, minor noise issues

For the price, you can't beat it. It works well for school projects. I did notice some jitter in readings when used near a running motor, but adding a simple capacitor fixed that. Highly recommend for beginners.

Anonymous

Mar 17, 2026

Rating: 5/5

Standard component, excellent quality

This is the industry standard ultrasonic sensor for a reason. Consistent performance, durable pins, and accurate measurements. I keep a few in my parts bin at all times.

Anonymous

Mar 11, 2026

Rating: 5/5

Easy to code for

As someone new to electronics, I was worried this would be hard to interface. The documentation online is extensive, and the pulseIn function in Arduino makes reading the distance trivial. Very satisfied.

Anonymous

Mar 06, 2026

Rating: 5/5

Perfect for my robotics project

This sensor works flawlessly with my Arduino Uno. The range is accurate up to about 3 meters in my testing, which is plenty for my obstacle-avoiding robot. Setup was easy using standard libraries.

5 FAQ

Q: Does this come with jumper wires?

A: No, this package includes only the HC-SR04 sensor module. Jumper wires and microcontroller boards are sold separately.

Q: What is the minimum detection distance?

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

Q: Is this sensor waterproof for outdoor use?

A: No, the HC-SR04 is not waterproof. The exposed circuit board and transducers can be damaged by moisture. For outdoor applications, you must house it in a waterproof enclosure with an opening for the sound waves, or look for a specifically waterproof ultrasonic sensor model.

Q: How do I handle multiple sensors on one Arduino?

A: You can connect multiple sensors by assigning unique Trigger and Echo pins for each module in your code. Ensure you trigger them sequentially with a small delay (e.g., 60ms) between measurements to prevent cross-talk where one sensor hears the echo from another.

Q: Can this sensor be used directly with a 3.3V Raspberry Pi GPIO?

A: Yes, the module operates on a wide voltage range of 3-5V. However, while the VCC can be 3.3V, the Echo output may still output 5V logic depending on the specific batch. It is generally recommended to use a voltage divider on the Echo pin when connecting to 3.3V logic boards to be safe.

Explore your interests

ESP32-S3 Core Development Board - WiFi & Bluetooth DevKitC-1 (C3, N8R2, N16R8 Modules)

$19.24

Pulse Heart Rate Sensor Compatible Bio-Simulation Sensor Header Pins No Soldering Required

$6.35

[Youxin Electronics] Soil Moisture Meter Detection Module, Soil Moisture Sensor for Intelligent Robot Cars

$2.09

Circular Magnetic Rack Strong Magnet for Injection Molding Machine Dryer Filter, Magnetic Rod, Iron Suction Bar, Iron Remover, Powerful Magnet

$191.81

Instax Shutter Timer Selfie Artifact Fujifilm instax SQ Series Non-Destructive Installation

$58.00

New STM32 Desktop Pet Smart Dog - STM32 Development Board AI Robot Dog Electronic Kit

$162.74

Powerful Magnet Square with Holes Strong Magnet Neodymium Magnet Magnetic Steel Super Strong Rectangular Countersunk Hole Lodestone Square

$20.00

Car Vibrator/Piezoelectric Vibration Sensor Motorcycle Anti-Theft Alarm Vibration Sensor Module Ceramic Plate

$13.00

Purchased Product Industrial Retractable Car Repair Tool Strong Magnetic Picker Magnetic Rod for Car Repair and Home Use

$28.00

Natural Cinnabar Rose Beads, Purple Gold Sand 'Blooming Prosperity' DIY Bracelet and Ring Accessories, Buddhist Prayer Bead Charms

$1.30

Super Strong Rectangular Magnet with Hole, 50x30x5mm with M6 Countersunk Hole, 50*30*5mm Magnet

$22.00

Anlixin Solder Wire High Purity Lead-Free Eco-Friendly Tin Wire for Soldering Iron Phone Repair with Rosin Core Leaded Solder Available

$7.79

Powerful Magnetic Rod for Picking Up Scrap Iron, Ultra-High Strength Magnet, Strong Magnetic Rack, Super Strong Magnetic Bar for Scrap Yards

$437.00

YwRobot Color LCD Display Module for Arduino with TF Card Slot IPS Screen ST7789

$22.00

Genuine ARDUINO MEGA 2560 R3 A000067 ATmega2560 Development Board Module

$221.50

M03 M04 Water Level Detection Module Sensor, Green Non-Contact Liquid Level Touch Switch

$1.15

MQ-8 Hydrogen Gas Sensor Module

$7.73

MAX30100/MAX30102 Blood Oxygen Heart Rate Wrist Pulse Detection Monitoring Biosensor Module

$5.39

300 SMT Component Soldering Kit High-Intensity Practice Board PCB Skills Competition TJ-56-273

$42.40

Kunlun Coast Industrial Wide-Temperature Transmitter Split Type Temperature and Humidity Sensor JWSK-6

$100.00

Digital + Analog LM386 Sound Detection Sensor Voice Control Switch Audio Waveform Microphone Module

$20.00

Wildfire Zhengtu Pro FPGA Development Board ALTERA CycloneIV EP4CE10F17C8N Image Processing

$502.00

[Puzhong Brand Store] 51 Microcontroller Learning Board Development Board Jiangxie Tech STC89C52 DIY Kit

$69.50

EchoEar MeowMate PCB Development Board Kit Components Espressif Xiaozhi AI Volcengine Open Source Replica

$0.50

Magnetic Rod 14000-2400GS Stainless Steel Industrial Iron Removal Rod Neodymium Iron Boron High-Temperature Magnetic Rod Heat-Resistant Strong Magnet

$136.30

N52 Round Radial Magnetized Neodymium Strong Magnet Cylinder Side Magnetized High-Strength Magnet Special Magnetization

$4.50

[Corrosion-Resistant] DFRobot Capacitive Soil Moisture Sensor Module Dry/Wet Detection

$35.00

(Loose Parts) Photo-Sensitive Light-Controlled Audio-Visual Alarm Kit with Buzzer and Double-Sided PCB Board for Teaching, Training, and Soldering Practice

$6.80

STM32F103RCT6 Development Board Minimum System Board STM32 Development Board FREERTOS ARM Embedded

$50.00

Raspberry Pi 4 Case Aluminum Alloy Heat Dissipation

$21.90

Stainless Steel Soldering Paste Flux - Strong Tinning, No-Clean, Acid-Free, Halogen-Free Rosin for Electric Soldering Irons

$39.90

Round Magnet with Hole, Strong Magnet D10x3 with M3 Countersunk Hole, Ring Magnet Lodestone Magnetic Ring

$15.30

Luxianzi Powerful Solder Sucker Manual Solder Removal Gun Large Suction Silicone Nozzle for Removing Solder Residue Desoldering Vacuum Pump Soldering Iron

$5.45