Attributes

Brand	-
Category	Electronic Components / Maker DIY / Computer Hardware, Monitors & Peripherals
Origin	-
Model Number	AJ-SR04M / RCWL-1670
Operating Voltage	3.3V - 5V DC
Detection Range	2cm - 450cm
Waterproof Rating	IP67
Ultrasonic Frequency	40kHz
Interface Type	Single Wire UART / TTL
Dimensions	23mm x 45mm x 15mm
Operating Temperature	-20°C to 70°C
Static Current	< 2mA
Package Content	1x Sensor Module, 1x Connection Cable

5 reviews

Anonymous

Apr 02, 2026

Rating: 5/5

Exactly as described

Fast shipping and the module works immediately. Measured distance accurately up to 4 meters.

Anonymous

Feb 10, 2026

Rating: 4/5

Good sensor, tricky library

Hardware is solid. Had to write a custom library for ESP32 but once working, it's reliable.

Anonymous

Jan 27, 2026

Rating: 5/5

Single wire is convenient

Saves GPIO pins compared to HC-SR04. Great for projects with limited pins.

Anonymous

Jan 23, 2026

Rating: 3/5

Range varies in humidity

Works well indoors. Outdoors in high humidity, the max range drops slightly. Still usable.

Anonymous

Jan 23, 2026

Rating: 5/5

Perfect for outdoor robot

Used this for my garden robot. Waterproofing holds up well against sprinklers. Much better than the standard blue sensors.

5 FAQ

Q: What is the maximum detection distance?

A: Under ideal conditions, it reaches up to 4.5 meters.

Q: What is the beam angle?

A: The ultrasonic beam angle is approximately 15 degrees.

Q: Is this compatible with Arduino Uno?

A: Yes, it works with 5V logic Arduino boards.

Q: Can this be submerged in water?

A: No, it is waterproof against rain/splashes (IP67) but not designed for submersion.

Q: Does it use Trig and Echo pins?

A: No, this model uses a single TX/RX wire for communication.

Explore your interests

Beikecom ESP32-S3 Core Board (N8R2/N16R8) with Bluetooth/WiFi Module, 44-Pin Xiaozhi Robot

$29.20

Platinum Resistance Temperature Detector Module PT100/PT1000 RTD Sensor with Host Software

$39.90

Rain Drop Sensor Module Rain Detection Weather Module Water Level Display Module

$4.03

N52 Super Strong Square Magnet, Neodymium Iron Boron Bar Magnet, Powerful Magnetic Blocks

$10.50

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

$58.00

STM32 Beginner Kit Minimum System Board Electronic Breadboard Same as University Science Association Models

$56.60

lalaci Round N52 Strong Magnet High Performance Powerful Small Magnet Diameter 1/2/3/4/5/6/8 Manufacturer NdFeB

$3.25

TDS Sensor Module Analog Signal Dissolved Solids Water Quality Detector Compatible with 51/STM32 Modules

$44.00

N52 Strong Magnet Small Round Mini Powerful Tiny Magnet High-Performance Neodymium Iron Boron Super Strong Magnet Steel 2-8mm

$5.50

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

$1.30

Strong Magnet with Hole Square Magnet Block High-Performance Neodymium Iron Boron Countersunk Hole Magnet Steel Magnet Stone Patch

$0.50

New Stainless Steel Solder Wire Lighter Usable High Purity Tin Wire Universal Welding Tool Soldering Wire

$2.90

New Industrial Iron Picker Iron Sucker Magnetic Quick Magnetic Rod G Parts Manual Magnet Nail Sweeper Simple

$386.24

Waveshare MCP23017 I/O Expansion Module Compatible with Raspberry Pi/Micro:bit/STM32/Arduino

$34.00

Voice Playback Module MP3 Prompter Trigger Once Play Once Announcer Compatible with Arduino

$29.00

TCS34725 Color Recognition Sensor, RGB Development Board Color Sensing Module, IIC Communication Color

$22.36

MQ-7 Carbon Monoxide Sensor Module for CO Combustible Gas Detection and Leak Alarm

$7.64

Electrochemical Formaldehyde Sensor Module ZE08-CH2O Formaldehyde Gas Detection Module UART

$36.80

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

NVIDIA JETSON NANO B01 Development Board 4GB Core ORIN Kit AI Artificial Intelligence ROS Motherboard

$899.00

Wildfire Shengteng Mini FPGA Development Board Xilinx Artix-7 XC7A35T/100T/200T A7 Board

$665.00

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

$0.50

Strong Magnetic Rod with Lifting Ring Industrial Magnetic Force 304 Stainless Steel Stable Mining Iron Removal Magnet

$202.00

Thickened Strong Magnetic Rubber Soft Magnetic Sheet A4 Advertising Magnetic Car Sticker, Flexible Magnet with Adhesive Backing, Magnetic Paper

$17.50

MAX31865 RTD Sensor Module for Platinum Resistance Temperature Detection (PT100 to PT1000)

$31.00

(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

FarSight WS63 NearLink Development Board Hi3863 HarmonyOS OpenHarmony IoT WiFi Bluetooth BLE

$199.00

Raspberry Pi 4 Case Aluminum Alloy Heat Dissipation

$21.90

Anlixin Solder Paste Solder Cream SMT Patch Mobile Phone Repair Reballing LED Welding High Medium Low Temperature Lead-Free Solder Mud

$25.80

Strong Magnetic Suction Patches, Round Neodymium Magnets with Holes, High-Strength Fixed Suction Force

$2.55

Desktop Soldering Fixture for Mobile Phone Repair - Electronic Holding Stand with Soldering Iron Support and Auxiliary Tools

$11.64

Conductivity Transmitter EC/TDS Sensor Module, RS485 Online Water Quality Monitoring for Hardness and Dissolved Solids, 3-Wire

$23.00

INA219 I2C Interface Zero-Drift Bidirectional Current/Power Monitor Sensor Module

$9.68

N52 Strong Magnet Iron Attractor Round Powerful Magnet Magnetic Stone Sheet Neodymium Iron Boron High-Strength Magnet Rare Earth Magnetic Steel Permanent Magnet

$7.07