RCWL-1670 Waterproof Ultrasonic Module
$6.991 pcs
The RCWL-1670 waterproof transceiver split ultrasonic distance sensor module features an ultra-low power consumption of 1.5uA.
| Dimensions | 56.6 × 23 × 11 mm |
|---|---|
| Brand |
easyelecmodule |
561 in stock
Introduction
The RCWL-1670 is a waterproof, separate-transmit-receive ultrasonic distance measurement module. It offers a measuring range of 2cm-400cm, operates on a wide voltage of 3V to 5V, and features ultra-low standby power consumption (1.5µA at 3.3V / 3.5µA at 5V). The module consists of a separate waterproof ultrasonic sensor (transmitter and receiver) and a control circuit. Its external control software is compatible with our HC-SR04 module.
This ultrasonic module is waterproof and dustproof, making it suitable for humid and harsh measurement environments. Its ultra-low standby power consumption also allows it to be used in battery-powered applications.
How dose Ultrasonic Sensor work？
Similar to the working principle of infrared and visible light sensors, ultrasonic sensors also measure distance and identify, distinguish and measure objects by emitting ultrasonic waves, which are reflected by the object being measured, and then using the received ultrasonic waves.Unlike light waves, microwaves, or infrared waves and other electromagnetic waves, ultrasonic waves are mechanical waves with a vibration frequency higher than 20kHz. The general application extends from 50 KHZ to 5MHz. Since 20kHz is the upper limit of the frequency of sound that humans can hear, it is called ultrasonic waves.
The measurement principle of ultrasonic waves is as follows: The ultrasonic transmitter emits ultrasonic pulses, which travel through the medium (air) to the surface of the obstacle and then are reflected before reaching the receiver. By measuring the time required for ultrasonic waves to travel from emission to reception and combining it with the speed of sound in the medium, the distance between the probe and the surface of the obstacle can be calculated.
Key Hardware Specifications of the RCWL-1670
| Parameter | Notes | Minimum Value | Typical Value | Maximum Value | Unit |
|---|---|---|---|---|---|
| Operating Voltage | 2.8 | 6 | 5.5 | V | |
| Operating Current | 8 | mA | |||
| Standby Current (3.3V) | 1.5 | 3 | uA | ||
| Standby Current (5V) | 3.5 | 5 | uA | ||
| Maximum Detection Distance (Flat Wall) | 400 | 600 | CM | ||
| Operating Frequency | 40 | KHz | |||
| Blind Zone (Intra-Zone Latency) | 2 | 3 | CM | ||
| Detection Accuracy | Same temperature, ±10M+ | 1 | % | ||
| Resolution (Theoretical) | 1 | mm | |||
| Detection Angle (Max Directional Angle) | ±15 | ±20 | ° | ||
| Measurement Cycle | 50 | mS | |||
| Output Interface Mode | GPIO | ||||
| Operating Temperature | -10 | 70 |
Performance Parameter
| Parameter | Specification |
|---|---|
| Operating Voltage | 3–5.5V |
| Operating Current | 6mA |
| Standby Current | 3.5μA @ 5V; 1.5μA @ 3.3V |
| Software Compatibility | Compatible with HC-SR04 |
| Blind Zone | 2CM |
| Typical Maximum Detection Distance | 4M |
| Measurement Cycle | 50ms |
RCWL-1670 Pin Definition
| Serial No. | Label | Pin Description |
|---|---|---|
| 1 | 5V | 3–5V Power Supply |
| 2 | TX | Echo – Distance Return Signal |
| 3 | RX | Trig – Trigger Signal |
| 4 | GND | Ground |
Operating Principle
It works the same way as the HC-SR04:The external MCU sends a high-level pulse (lasting more than 10µs) to the module’s Trig pin. The module then outputs a high-level pulse signal proportional to the measured distance. You can calculate the distance using the pulse width “T”. After outputting the pulse, the module enters a low-power state.
Distance Calculation Formula
Distance = T * C / 2 (where C = speed of sound)
Speed of Sound Formula (Temperature-Dependent)
c = (331.45 + 0.61t/°C) m·s⁻¹ (Note: 331.45 is the speed of sound at 0°C)
Notes on Accuracy
The speed of sound has an error of about 7% between 0°C and 40°C. For precise distance measurements in practical applications, you need to account for temperature effects and perform temperature compensation. If this is required, please check out our temperature-compensated module RCWL-1671.
Usage Notes
Applications of RCWL-1670
- Outdoor Robot Obstacle Avoidance:Enables rainproof/waterproof outdoor robots (likelawn mowing robots, delivery drones) to detect obstacles like curbs or puddles within 2cm–4m in real time, adjusting paths to avoid collisions even in wet, rainy conditions.
- Liquid & Water Level Measurement: Works stably in high-humidity environments to monitor water levels in fish tanks, industrial chemical tanks, or agricultural irrigation reservoirs, triggering alarms or pump controls when levels are too high/low.
- Garbage Bin Detection:Installed at the top of outdoor bins, it measures the distance to accumulated garbage; when the distance drops below a threshold (like 10cm), it sends signals to management systems for timely collection.
- Other Ranging Applications:Adapts to scenarios like smart irrigation (detecting crop height to adjust water volume), vehicle parking assistance (alerting to rear obstacles), and public facility water accumulation monitoring (triggering flood warnings in subway entrances).
Shipping Cost
We only ship to the United States. Shipping costs are calculated based on the total order amount.
Shipping Method And Delivery Time
All orders will be processed and shipped within 72 hours of placing the order (excluding weekends and holidays). They will ship from Shenzhen, China, primarily via 4PX logistics. Depending on the destination and logistics conditions, other carriers such as DHL, FedEx, UPS, USPS, etc., may also handle the delivery. Estimated shipping time is 7-12 business days, with actual delivery occurring in 10-17 business days, depending on logistics conditions.
Payment:
We accept Visa, Master card, Maestro, American Express, JCB, Dinner's Club, Discover, Paypal, Apple Pay, Google Pay .
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