RCWL-1670 Waterproof Ultrasonic Distance Measuring Module

RCWL-1670 Waterproof Ultrasonic Distance Measuring Module

The RCWL-1670 is a high-performance, waterproof and dustproof ultrasonic distance measuring module designed for reliable ranging in wet, dusty, and demanding environments. Whether you're building an Arduino project, an automated liquid level monitor, or an obstacle detection system, this module delivers accurate, consistent results from 2 cm to 400 cm — all while drawing ultra-low standby current for battery-friendly applications.

Using a split transceiver design (separate transmitter and receiver probes), the RCWL-1670 is fully software-compatible with the popular HC-SR04 module, making it a drop-in waterproof upgrade for existing projects. Made in Mainland China.

Key Features

• Waterproof & Dustproof: Sealed probes withstand moisture, splashes, and particulate environments with ease
• Wide Ranging Distance: 2 cm minimum blind zone to 400 cm (4 m) typical maximum range
• Wide Operating Voltage: 2.8 V – 5.5 V, compatible with 3.3 V and 5 V microcontrollers
• Ultra-Low Standby Power: Only 1.5 µA @ 3.3 V / 3.5 µA @ 5 V — ideal for battery-powered builds
• HC-SR04 Software Compatible: No new code required if you already use HC-SR04 libraries
• Split Transceiver Design: Separate transmitter and receiver probes for flexible installation
• Fast Measurement Cycle: 50 ms per measurement for responsive real-time distance sensing

Technical Specifications

Common Applications

• Water tank and liquid level monitoring
• Outdoor obstacle detection and avoidance
• Robotics and autonomous vehicle projects
• Parking and proximity sensing systems
• Industrial distance measurement in harsh environments

Why Choose the RCWL-1670?

Unlike standard open-air ultrasonic sensors, the RCWL-1670 features fully sealed, waterproof probes that stand up to rain, humidity, and dust — making it the go-to choice for outdoor and industrial maker projects. Its ultra-low standby current ensures your battery-powered devices last longer between charges, while the HC-SR04 compatibility means you can integrate it in minutes.

For more information on ultrasonic sensing technology and safety standards for electronic components, visit NIST Electronics Resources.

Frequently Asked Questions

Q: Is the RCWL-1670 waterproof ultrasonic module compatible with Arduino?

A: Yes! The RCWL-1670 is fully software-compatible with the HC-SR04 ultrasonic sensor, which has extensive Arduino library support. You can use the same code and libraries you would use for the HC-SR04 — simply wire the module to your Arduino's 3.3 V or 5 V pin and corresponding GPIO pins and you're ready to measure distances.

Q: What is the maximum detection range of the RCWL-1670 ultrasonic distance measuring module?

A: The RCWL-1670 has a typical maximum ranging distance of 400 cm (4 meters), with a minimum blind zone of 2 cm. For best accuracy, keep targets within 2 cm – 300 cm and ensure the surface is reasonably reflective to the ultrasonic signal.

Q: Can the RCWL-1670 be used outdoors or in wet environments?

A: Absolutely. The RCWL-1670 is specifically designed with waterproof and dustproof probes, making it suitable for outdoor installations, liquid level sensing, and other humid or dusty conditions where standard open-air sensors would fail.

Q: What voltage does the RCWL-1670 ultrasonic module operate at?

A: The RCWL-1670 operates over a wide voltage range of 2.8 V to 5.5 V, making it compatible with both 3.3 V microcontrollers (such as ESP32, ESP8266) and 5 V systems (such as Arduino Uno). Standby current is just 1.5 µA at 3.3 V, making it very efficient for battery-powered projects.