Small Blind Zone IP67 Waterproof Ranging Distance Ultrasonic Sensor Module
Product Description
Product Overview
The MSWM-M02-V2.0 Small Blind Zone IP67 Waterproof Ranging Distance Ultrasonic Sensor Module is designed for short blind-zone distance measurement, waterproof ranging, object detection, liquid level sensing, and outdoor sensing applications. With a split waterproof probe and waterproof enclosure, it is suitable for environments where moisture resistance and stable ultrasonic measurement are required.
This ultrasonic distance sensor module supports multiple output options, including PWM pulse output, UART controlled output, HART auto output, switch output, and RS485 output. The 3cm blind area and 3–450cm plane object ranging capability make it suitable for compact detection systems, automation devices, smart equipment, parking systems, robots, water level monitoring, and industrial control applications.
With low working current, optional temperature compensation, and different communication interfaces, this waterproof ultrasonic sensor module provides flexible integration for OEM and ODM distance measurement projects.
Key Features
IP67 waterproof design with split waterproof probe and waterproof enclosure for reliable use in wet or outdoor environments.
Small 3cm blind area supports close-range detection where standard ultrasonic modules may not perform well.
3–450cm plane object range supports medium-range distance measurement for automation and sensing systems.
Multiple output versions are available, including PWM, UART, HART auto output, switch output, and RS485 output.
Low average working current helps support energy-efficient embedded and battery-powered applications.
Temperature compensation is available on UART, HART auto output, switch output, and RS485 versions for improved measurement stability.
Technical Specifications
| Parameter | PWM Pulse Output | UART Controlled Output | HART Auto Output | Switch Output | RS485 Output | Unit |
|---|---|---|---|---|---|---|
| Working Voltage | 3.3–5 | 3.3–5 | 3.3–5 | 3.3–5 | 5–24 | V(DC) |
| Standby Current | ≤5 | ≤5 | - | - | - | μA |
| Average Working Current | ≤8 | ≤8 | ≤8 | ≤8 | ≤15 | mA |
| Peak Current | ≤40 | ≤40 | ≤40 | ≤40 | ≤75 | mA |
| Blind Area Distance | 3 | 3 | 3 | 3 | 3 | cm |
| Plane Object Range | 3–450 | 3–450 | 3–450 | 3–450 | 3–450 | cm |
| Work Cycle | Controlled | Controlled | 100 | 100 | Controlled | ms |
| Measurement Accuracy at Room Temperature | ±(1+S×0.5%) | ±(1+S×0.5%) | ±(1+S×0.5%) | ±(1+S×0.5%) | ±(1+S×0.5%) | cm |
| Temperature Compensation | No Compensation | Compensation | Compensation | Compensation | Compensation | - |
Output Options
The PWM pulse output version is suitable for simple distance measurement systems where pulse width can be read by a microcontroller.
The UART controlled output version is suitable for embedded systems requiring serial communication and temperature compensation.
The HART auto output and switch output versions are suitable for applications requiring automatic measurement cycles or threshold-based detection.
The RS485 output version supports 5–24V DC operation and is suitable for industrial communication, longer wiring distance, and multi-device monitoring systems.
Applications
This waterproof ultrasonic sensor module is suitable for distance measurement, obstacle detection, water level sensing, tank level monitoring, parking assistance, robot ranging, smart trash bins, industrial automation, access control devices, outdoor equipment, and IoT sensing systems.
It is also suitable for product development projects that need a small blind-zone ultrasonic module with waterproof construction and multiple interface options.
Working Principle
The ultrasonic ranging module measures distance by transmitting ultrasonic pulses and receiving the reflected echo from the target object. The system calculates distance according to the time difference between transmission and echo reception.
Because sound speed changes with temperature, versions with temperature compensation can help improve measurement stability in changing environments.
Installation and Use Notes
Install the waterproof probe facing the target surface and keep the ultrasonic path clear. Avoid placing the probe too close to side walls, sharp edges, strong airflow, foam, or irregular surfaces that may scatter the ultrasonic echo.
For liquid level or water level measurement, install the probe vertically above the measured surface and keep the target area as stable as possible. Turbulence, vapor, foam, and angled surfaces may affect echo quality.
Choose the correct output version according to the control system, wiring distance, power supply, communication protocol, measurement cycle, and temperature compensation requirement.
Why Choose This Waterproof Ultrasonic Sensor Module
The MSWM-M02-V2.0 sensor module combines a small 3cm blind zone, IP67 waterproof construction, 3–450cm ranging capability, low current consumption, and multiple output options. It is suitable for engineers who need a compact and reliable ranging module for wet, outdoor, or industrial environments.
Its PWM, UART, HART auto output, switch output, and RS485 versions help manufacturers select the most suitable interface for different embedded systems, automation devices, and monitoring platforms.
FAQ
What is the blind zone of this ultrasonic sensor module?
The blind zone distance is 3cm. Objects closer than this range may not be measured reliably, so the sensor should be installed with enough clearance from the target.
How far can this waterproof ultrasonic sensor measure?
The plane object range is 3–450cm under suitable measuring conditions. Actual performance may vary depending on target shape, surface angle, environment, and installation structure.
What output types are available?
The module supports PWM pulse output, UART controlled output, HART auto output, switch output, and RS485 output versions for different control and communication requirements.
How should I choose between PWM, UART, and RS485 output?
Choose PWM for simple microcontroller distance reading, UART for serial communication with temperature compensation, and RS485 for industrial systems requiring stronger communication over longer cable distances.
Can this sensor be used outdoors or near water?
Yes. The product is designed with IP67 waterproof construction, split waterproof probe, and waterproof enclosure, making it suitable for wet environments and many outdoor sensing applications.
What affects ultrasonic ranging accuracy?
Accuracy can be affected by temperature, target surface angle, object material, airflow, humidity, foam, turbulence, installation position, and echo interference from surrounding structures.