{"product_id":"waterproof-ultrasonic-distance-sensor-30-500cm","title":"Waterproof Ultrasonic Distance Sensor (30~500cm)","description":"\u003ch2\u003eIntroduction\u003c\/h2\u003e\n\u003cp\u003eThe ultrasonic distance sensor is a high-performance, weatherproof ultrasonic distance sensor designed for reliable operation in challenging environments. It operates on the principle of sonar, emitting high-frequency sound waves and calculating distance based on the time-of-flight of the returning echo. Its key differentiators are a robust, fully-sealed probe separate from the main circuit board, high-precision measurement with temperature compensation, and multiple versatile operating modes to suit a wide range of applications.\u003cb\u003e\u003c\/b\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eRobust Weatherproof Design \u003c\/b\u003e\u003c\/p\u003e\n\u003cp\u003eThe core feature of the ultrasonic distance sensor is its fully enclosed and sealed ultrasonic probe. This design provides significant protection against moisture, dust, and other environmental contaminants, making it ideal for long-term outdoor deployment or in industrial settings where standard sensors would fail. Unlike conventional open-element sensors, it can reliably function in rainy conditions without compromising performance or longevity.\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eHigh-Precision Ranging Performance \u003c\/b\u003e\u003c\/p\u003e\n\u003cp\u003eEngineered for accuracy, the ultrasonic distance sensor provides a resolution of \u003cb\u003e3mm across its 30cm to 500cm detection range\u003c\/b\u003e. Crucially, it incorporates built-in temperature compensation. This feature automatically adjusts for variations in the speed of sound caused by temperature fluctuations, ensuring consistent and reliable distance readings across its entire operating range of -20°C to 70°C. The wide 60° measuring angle allows for effective detection of objects within a broad area.\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eVersatile Operating Modes \u003c\/b\u003e\u003c\/p\u003e\n\u003cp\u003eTo maximize compatibility and ease of integration, the SEN0208 offers several distinct operating modes, allowing it to adapt to different system architectures:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003ePWM Pulse Width Output (Mode 0): The standard trigger\/echo mode. A high pulse on the trigger pin initiates a measurement, and the sensor returns a pulse on the echo pin whose duration is proportional to the measured distance. This is ideal for direct connection to microcontrollers.\u003c\/li\u003e\n\u003cli\u003eUART Automatic Output (Mode 1): In this mode, the sensor autonomously performs a measurement every 100ms and streams the distance data via its UART TX pin. This simplifies implementation by offloading timing control from the host processor.\u003c\/li\u003e\n\u003cli\u003eUART Controlled Output (Mode 2): This mode provides on-demand measurement via UART. The host controller sends a trigger command to the sensor's RX pin, and the sensor responds with a single distance measurement. This allows for precise control over when measurements occur.\u003c\/li\u003e\n\u003cli\u003eSwitch Output (Mode 3): This mode transforms the sensor into a non-contact proximity switch. When an object is detected within a pre-set distance threshold (default 1.5m), the output pin goes to a high state. This is perfect for simple presence detection applications without needing a microcontroller to interpret data.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cb\u003e\u003cspan style=\"color: #ff0000;\"\u003eNote: \u003c\/span\u003e\u003c\/b\u003eThis Version 2.0 model is a significant upgrade to the previous SR04T model. Key enhancements include a wider operating voltage range of 3.3V to 5V (compared to the 5V-only SR04T), providing greater compatibility. Additionally, it features multiple selectable operating modes for superior flexibility and versatility in various applications.\u003c\/p\u003e\n\u003ch2\u003eApplications\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eRobotics and Autonomous Vehicles: For robust obstacle avoidance and navigation in all weather conditions.\u003c\/li\u003e\n\u003cli\u003eIndustrial Automation: For liquid level sensing in tanks, material height monitoring in hoppers, and object detection on production lines.\u003c\/li\u003e\n\u003cli\u003eAutomotive Systems: As a durable sensor for parking assist and vehicle detection systems.\u003c\/li\u003e\n\u003cli\u003eSecurity and Monitoring: For reliable presence detection in outdoor security systems or public spaces.\u003c\/li\u003e\n\u003cli\u003eSmart City Projects: For applications like monitoring fill levels in public waste bins or detecting vehicle presence in smart parking lots.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eSpecification\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eWorking voltage: DC 3.3-5V\u003c\/li\u003e\n\u003cli\u003eDetection range: 30cm~500cm\u003c\/li\u003e\n\u003cli\u003eAccuracy: ±(1+S*0.5%)\u003c\/li\u003e\n\u003cli\u003eMeasurement angle: 60°\u003c\/li\u003e\n\u003cli\u003eQuiet current: 8mA\u003c\/li\u003e\n\u003cli\u003eWorking current: 40mA\u003c\/li\u003e\n\u003cli\u003eWorking frequency: 40KHz\u003c\/li\u003e\n\u003cli\u003eResolution: 3mm\u003c\/li\u003e\n\u003cli\u003eTemperature compensation: Yes\u003c\/li\u003e\n\u003cli\u003eWorking temperature: -20 ~ 70°C\u003c\/li\u003e\n\u003cli\u003ePCB Size: 42 * 29 * 12 mm\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eShipping List\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eWaterproof Ultrasonic Distance Sensor x1\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eDocuments\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003ca href=\"https:\/\/wiki.dfrobot.com\/sen0208\/\" target=\"_blank\"\u003eProduct Wiki\u003c\/a\u003e\u003cbr\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"DFRobot","offers":[{"title":"Default Title","offer_id":67648192970829,"sku":"E39029-001","price":23.87,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0668\/0641\/5437\/files\/E39029-win1.jpg?v=1791667075","url":"https:\/\/www.mlab.com.au\/products\/waterproof-ultrasonic-distance-sensor-30-500cm","provider":"MLAB","version":"1.0","type":"link"}