Description
Reviews
| 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 |
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.
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.
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